cesium/CHANGES.md

CesiumJS is a JavaScript library for creating 3D globes and 2D maps in a web browser without a plugin.

# Change Log

## 1.133.1 - 2025-09-08

This is an npm-only release to fix a dependency issue published in 1.133.0

## 1.133 - 2025-09-02

- Give the [new version of Sandcastle](https://dev-sandcastle.cesium.com/) a try today!

### @cesium/engine

#### Breaking Changes :mega:

- Removed the argument fallback in `ITwinData.*` functions. Instead, use the new options argument signature. [#12778](https://github.com/CesiumGS/cesium/issues/12778)

#### Additions :tada:

- Added support for the [EXT_mesh_primitive_restart](https://github.com/KhronosGroup/glTF/pull/2478) glTF extension. [#12764](https://github.com/CesiumGS/cesium/issues/12764)
- Added spherical harmonics support for Gaussian splats, supported with the SPZ compression format. [#12790](https://github.com/CesiumGS/cesium/pull/12790)
- Added `Ellipsoid.MARS` for use with Mars terrain and imagery. [#12828](https://github.com/CesiumGS/cesium/pull/12828)
- Allow passing `Cesium3DTileset` constructor options to the tileset that is created with `ITwinData.createTilesetForRealityDataId`. [#12709](https://github.com/CesiumGS/cesium/issues/12709)

#### Fixes :wrench:

- Fixed issue where a Gaussian splat tileset would be rendered even if out of current camera view. [#12840](https://github.com/CesiumGS/cesium/pull/12840)
- Removes the minimum tile threshold of four for WMTS. [#4372](https://github.com/CesiumGS/cesium/issues/4372)
- Fixed a crash when loading PNTS (point cloud) data that contained a batch table without a binary part. [#11166](https://github.com/CesiumGS/cesium/issues/11166)
- Fixed an error picking an area hidden by a `ClippingPolygon`. [#12725](https://github.com/CesiumGS/cesium/issues/12725)

#### Deprecated :hourglass_flowing_sand:

- Deprecated support for the `KHR_spz_gaussian_splats_compression` extension in favor of the latest 3D Gaussian splatting extensions for glTF, `KHR_gaussian_splatting` and `KHR_gaussian_splatting_compression_spz_2`. The deprecated extension will be removed in version 1.135. To ensure support in CesiumJS 1.135 and beyond, Please re-tile existing Gaussian splatting 3D Tiles before November 1, 2025. [#12837](https://github.com/CesiumGS/cesium/issues/12837)

## 1.132 - 2025-08-01

### @cesium/engine

#### Fixes :wrench:

- Fixes incorrect polygon culling in 2D scene mode. [#1552](https://github.com/CesiumGS/cesium/issues/1552)
- Fixes material flashing when changing properties. [#1640](https://github.com/CesiumGS/cesium/issues/1640), [#12716](https://github.com/CesiumGS/cesium/issues/12716)
- Fixed an issue where draped imagery on tilesets was not updated based on the visibility of the imagery layer. [#12742](https://github.com/CesiumGS/cesium/issues/12742)
- Fixes an exception when removing a Gaussian splat tileset from the scene primitives when it has more than one tile. [#12726](https://github.com/CesiumGS/cesium/pull/12726)
- Fixes rendering of Gaussian splats when they are scaled by the glTF transform, tileset transform, or model matrix. [#12721](https://github.com/CesiumGS/cesium/issues/12721), [#12718](https://github.com/CesiumGS/cesium/issues/12718)
- Fixes label background translucency issue. [#12673](https://github.com/CesiumGS/cesium/issues/12673)
- Updated the type of many properties and functions of `Scene` to clarify that they may be `undefined`. For the full list check PR: [#12736](https://github.com/CesiumGS/cesium/pull/12736)
- Fixes Gaussian splats incorrectly rendering when `Cesium3DTileset.show` is `false`. [#12748](https://github.com/CesiumGS/cesium/pull/12748)
- Fixed the PointCloudShading.normalShading parameter, to disable normal shading when set to false, even if the point cloud contains normals. [#11196](https://github.com/CesiumGS/cesium/issues/11196)
- Updated GPU vertex transformations to reduce precision errors. [#4250](https://github.com/CesiumGS/cesium/issues/4250)
- Fixes Gaussian splats orientation with respect to glTF up-axis by updating `spz-loader` to version `0.3.0`. [#12737](https://github.com/CesiumGS/cesium/issues/12737), [#12749](https://github.com/CesiumGS/cesium/issues/12749)

#### Additions :tada:

- Expand the CustomShader Sample to support real-time modification of CustomShader. [#12702](https://github.com/CesiumGS/cesium/pull/12702)
- Add wrapR property to Sampler and Texture3D, to support the newly added third dimension wrap.[#12701](https://github.com/CesiumGS/cesium/pull/12701)
- Added the ability to load a specific changeset for iTwin Mesh Exports using `ITwinData.createTilesetFromIModelId` [#12778](https://github.com/CesiumGS/cesium/issues/12778)

#### Deprecated :hourglass_flowing_sand:

- Updated all of the `ITwinData.*` functions to accept an `options` parameter instead of individual arguments to avoid confusion with multiple optional arguments. There is a fallback to the old signature that will be removed in 1.133 [#12778](https://github.com/CesiumGS/cesium/issues/12778)

## 1.131 - 2025-07-01

### @cesium/engine

#### Fixes :wrench:

- Updates use of deprecated options on createImageBitmap. [#12664](https://github.com/CesiumGS/cesium/pull/12664)
- Fixed raymarching step size for cylindrical voxels. [#12681](https://github.com/CesiumGS/cesium/pull/12681)
- Fixes handling of tileset `modelMatrix` changes for translations and rotations in `GaussianSplatPrimitive`. [#12706](https://github.com/CesiumGS/cesium/pull/12706)

#### Additions :tada:

- Added `HeightReference` to `Cesium3DTileset.ConstructorOptions` to allow clamping point features in 3D Tile vector data to terrain or 3D Tiles [#11710](https://github.com/CesiumGS/cesium/pull/11710)
- Added the ability to pass `OffscreenCanvas` & `ImageBitmap` directly to `Material` uniforms. [#12558](https://github.com/CesiumGS/cesium/pull/12558)

## 1.130.1 - 2025-06-16

### @cesium/engine

#### Additions :tada:

- Added experimental support for loading 3D Tiles with Gaussian splats encoded with SPZ compression using the draft glTF extension [`KHR_spz_gaussian_splats_compression`](https://github.com/KhronosGroup/glTF/pull/2490). [#12582](https://github.com/CesiumGS/cesium/pull/12582)
- Added support for integral texture formats: R32I, RG32I, RGB32I, RGBA32I, R32UI, RG32UI, RGB32UI, RGBA32UI [#12582](https://github.com/CesiumGS/cesium/pull/12582)

## 1.130 - 2025-06-02

### @cesium/engine

#### Breaking Changes :mega:

- The `FragmentInput` struct for voxel shaders has been updated to be more consistent with the `CustomShader` documentation. Remaining differences in `CustomShader` usage between `VoxelPrimitive` and `Cesium3DTileset` or `Model` are now documented in the Custom Shader Guide. [#12636](https://github.com/CesiumGS/cesium/pull/12636). Key changes include:
  - The non-standard position attributes `fsInput.voxel.positionUv`, `fsInput.voxel.positionShapeUv`, and `fsInput.voxel.positionLocal` have been removed, and replaced by a single eye coordinate position `fsInput.attributes.positionEC`.
  - The normal in model coordinates `fsInput.voxel.surfaceNormal` has been replaced by a normal in eye coordinates `fsInput.attributes.normalEC`. Example:

```glsl
// Replace this:
// vec3 voxelNormal = normalize(czm_normal * fsInput.voxel.surfaceNormal);
// with this:
vec3 voxelNormal = fsInput.attributes.normalEC;
```

#### Additions :tada:

- Add basic support for draping imagery on 3D Tiles. [#12567](https://github.com/CesiumGS/cesium/pull/12567)
- Add support for 3D Textures and add Volume Cloud sandcastle example. [#12661](https://github.com/CesiumGS/cesium/pull/12611)

#### Fixes :wrench:

- Fixed voxel rendering with orthographic cameras. [#12629](https://github.com/CesiumGS/cesium/pull/12629)

## 1.129 - 2025-05-01

### @cesium/engine

#### Breaking Changes :mega:

- `VoxelProvider.minimumBounds` and `.maximumBounds` are now specified as physical values, rather than shape space values. [#12592](https://github.com/CesiumGS/cesium/pull/12592)

#### Additions :tada:

- Added `Material with Custom GLSL` Sandbox Demo. [#12549](https://github.com/CesiumGS/cesium/issues/12549)

#### Fixes :wrench:

- `QuadtreePrimitive.updateHeights` now converts position to Cartographic before invoking the callback, ensuring compatibility with change introduced by [commit 53889cb](https://github.com/CesiumGS/cesium/commit/53889cb) and preventing unnecessary computation. [#12555](https://github.com/CesiumGS/cesium/pull/12555)
- Fixed `Polyline*MaterialProperty` width artifacts (reverted [#12434](https://github.com/CesiumGS/cesium/pull/12434)). [#12506](https://github.com/CesiumGS/cesium/issues/12506)
- `Check.typeOf.object` now asserts `Record<string|number|symbol, any>` instead of `object` to allow property checks after assertion. [#12572](https://github.com/CesiumGS/cesium/issues/12572)

## 1.128 - 2025-04-01

### @cesium/engine

#### Breaking Changes :mega:

- `Camera.getPickRay` was erroneously returning a result in camera coordinates. It is now returned in world coordinates as stated in the documentation. The result can be transformed using `Camera.inverseViewMatrix` to achieve the previous behavior.
- `VoxelMetadataOrder` has been made private, and the `metadataOrder` property has been removed from the `VoxelProvider` interface.

#### Additions :tada:

- Added support for loading iTwin data using share keys as an alternative to user-based OAuth. When using a share key, set `ITwinPlatform.defaultShareKey`. [#12530](https://github.com/CesiumGS/cesium/pull/12530)
- Added `Frozen.EMPTY_OBJECT` and `Frozen.EMPTY_ARRAY` for use as default parameter values that avoid unnecessary memory allocations. [#12507](https://github.com/CesiumGS/cesium/pull/12507)

#### Fixes :wrench:

- Fixed entity tracking for delayed datasource bounding spheres. [#12465](https://github.com/CesiumGS/cesium/issues/12465)
- `Camera.getPickRay` now correctly returns a ray with origin in world coordinates in orthographic mode. [#12500](https://github.com/CesiumGS/cesium/pull/12500)
- Fixed camera zooming in 3D orthographic mode when pixelRatio is not 1. [#12487](https://github.com/CesiumGS/cesium/pull/12487)
- Fixed shape bounds and transforms for cylinder-shaped voxels. [#12522](https://github.com/CesiumGS/cesium/pull/12522)
- Fixed metadata ordering for ellipsoid voxel tilesets. [#12544](https://github.com/CesiumGS/cesium/pull/12544)
- Fixed an issue where clamped entities' height updates could stall when using high-resolution terrain due to a growing queue of tiles in `updateHeights` in `QuadtreePrimitive`. [#12476](https://github.com/CesiumGS/cesium/issues/12476)
- Fixed `VaryingType.MAT3` definition. [#12524](https://github.com/CesiumGS/cesium/issues/12524)

#### Deprecated :hourglass_flowing_sand:

- The `defaultValue` function has been deprecated, and will be removed in 1.134. Instead, use the logical OR (`||`) the [nullish coalescing (`??`)](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing) operator. See the [Coding Guide](https://github.com/CesiumGS/cesium/tree/main/Documentation/Contributors/CodingGuide#default-parameter-values) for usage information and examples.
- `defaultValue.EMPTY_OBJECT` has been deprecated, and will be removed in 1.134. Instead, use `Frozen.EMPTY_OBJECT`. See the [Coding Guide](https://github.com/CesiumGS/cesium/tree/main/Documentation/Contributors/CodingGuide#default-parameter-values) for usage information and examples.

## 1.127 - 2025-03-03

### @cesium/engine

#### Breaking Changes :mega:

- Updated `Cesium3DTilesVoxelProvider` to load glTF tiles using the new [`EXT_primitive_voxels` extension](https://github.com/CesiumGS/glTF/pull/69) to more closely align with the rest of the 3D Tiles ecosystem. Tilesets using the previous custom JSON format are no longer supported. [#12432](https://github.com/CesiumGS/cesium/pull/12432)
- Updated the `requestData` method of the `VoxelProvider` interface to return a `Promise` to a `VoxelContent`. Custom providers should now use the `VoxelContent.fromMetadataArray` method to construct the returned data object. For example:

```js
CustomVoxelProvider.prototype.requestData = function (options) {
  const metadataColumn = new Float32Array(options.dataLength);
  // ... Fill metadataColumn with metadata values ...
  const content = VoxelContent.fromMetadataArray([metadataColumn]);
  return Promise.resolve(content);
};
```

- Changed `VoxelCylinderShape` to assume coordinates in the order (radius, angle, height). See [CesiumGS/3d-tiles#780](https://github.com/CesiumGS/3d-tiles/pull/780)

#### Additions :tada:

- Implemented `texturesByteLength`, `visited`, and `numberOfTilesWithContentReady` in `VoxelPrimitive.statistics`. To use statistics, set `options.calculateStatistics` to `true` in the constructor. Note `VoxelPrimitive` is experimental.

#### Fixes :wrench:

- Exposed `CustomShader.prototype.destroy` as a public method. [#12444](https://github.com/CesiumGS/cesium/issues/12444)
- Fixed error when there are duplicated points in polygon/polyline geometries with `ArcType.RHUMB` [#12460](https://github.com/CesiumGS/cesium/pull/12460)
- Fixed ground atmosphere shaders in 3D orthographic mode [#12484](https://github.com/CesiumGS/cesium/pull/12484)
- Fixed zoom in 3D orthographic mode [#12483](https://github.com/CesiumGS/cesium/pull/12483)
- Fixed issue with billboards not clamping properly when nested inside a PrimitiveCollection [#12482](https://github.com/CesiumGS/cesium/pull/12482)
- Fixed error with black flashes on label and billboard updates. [#12231](https://github.com/CesiumGS/cesium/issues/12231)
- `TextureAtlas` has been refactored and internal APIs have been updated. If relying on the private texture atlas API, see [#12495](https://github.com/CesiumGS/cesium/pull/12495) for details.
  - Texture atlas now resizes more conservatively. This should help with texture memory overhead with may labels and billboards. [#172](https://github.com/CesiumGS/cesium/issues/172)
  - Texture atlas now reuses coordinates for existing subregions. [#2094](https://github.com/CesiumGS/cesium/issues/2094)

## 1.126 - 2025-02-03

### @cesium/engine

#### Breaking Changes :mega:

- `createGooglePhotorealistic3DTileset(key)` has been removed. Use `createGooglePhotorealistic3DTileset({key})` instead.
- Changed behavior of `DataSourceDisplay.ready` to always stay `true` once it is initially set to `true`. [#12429](https://github.com/CesiumGS/cesium/pull/12429)

#### Additions :tada:

- Add `ITwinData.loadGeospatialFeatures(iTwinId, collectionId)` function to load data from the [Geospatial Features API](https://developer.bentley.com/apis/geospatial-features/operations/get-features/) [#12449](https://github.com/CesiumGS/cesium/pull/12449)

#### Fixes :wrench:

- Fixed error when resetting `Cesium3DTileset.modelMatrix` to its initial value. [#12409](https://github.com/CesiumGS/cesium/pull/12409)
- Fixed the parameter types of the `ClippingPolygon.equals` function, and fixed cases where parameters to `equals` functions had erroneously not been marked as 'optional'. [#12394](https://github.com/CesiumGS/cesium/pull/12394)
- Fixed Draco decoding for vertex colors that are normalized `UNSIGNED_BYTE` or `UNSIGNED_SHORT`. [#12417](https://github.com/CesiumGS/cesium/pull/12417)
- Fixed urls with https in the documentation `basemap.nationalmap.gov` [#12375](https://github.com/CesiumGS/cesium/issues/12375)
- Fixed error in polyline when sinAngle is < 1. the value of expandWidth was too much. [#12434](https://github.com/CesiumGS/cesium/pull/12434)
- Allow external tilesets in multiple contents. [#12440](https://github.com/CesiumGS/cesium/pull/12440)
- Fixed type of `ImageryLayer.fromProviderAsync`, to correctly show that the param `options` is optional. [#12400](https://github.com/CesiumGS/cesium/pull/12400)
- Fixed type error when setting `Viewer.selectedEntity` [#12303](https://github.com/CesiumGS/cesium/issues/12303)

## 1.125 - 2025-01-02

### @cesium/engine

#### Additions :tada:

- Expanded integration with the [iTwin Platform](https://developer.bentley.com/) to load GeoJSON and KML data from the Reality Management API. Use `ITwinData.createDataSourceForRealityDataId` to load data as either GeoJSON or KML`. [#12344](https://github.com/CesiumGS/cesium/pull/12344)
- Added `environmentMapOptions` to `ModelGraphics`. For performance reasons by default, the environment map will not update if the entity position change. If environment map updates based on entity position are desired, provide an appropriate `environmentMapOptions.maximumPositionEpsilon` value. [#12358](https://github.com/CesiumGS/cesium/pull/12358)
- Added events to `VoxelPrimitive` to match `Cesium3DTileset`, including `allTilesLoaded`, `initialTilesLoaded`, `loadProgress`, `tileFailed`, `tileLoad`, `tileVisible`, `tileUnload`.

#### Fixes :wrench:

- Reduced memory usage and performance bottlenecks when using environment maps with models. [#12356](https://github.com/CesiumGS/cesium/issues/12356)
- Fixed `JulianDate` to always generate valid ISO strings for fractional milliseconds. [#12345](https://github.com/CesiumGS/cesium/pull/12345)
- Fixed intermittent z-fighting issue. [#12337](https://github.com/CesiumGS/cesium/issues/12337)

## 1.124 - 2024-12-02

### @cesium/engine

#### Additions :tada:

- Added an integration with the [iTwin Platform](https://developer.bentley.com/) to load iModels as 3D Tiles. Use `ITwinPlatform.defaultAccessToken` to set the access token. Use `ITwinData.createTilesetFromIModelId(iModelId)` to load the iModel as a `Cesium3DTileset`. [#12289](https://github.com/CesiumGS/cesium/pull/12289)
- Added an integration with the [iTwin Platform](https://developer.bentley.com/) to load Reality Data terrain meshes. Use `ITwinPlatform.defaultAccessToken` to set the access token. Then use `ITwinData.createTilesetForRealityDataId(iTwinId, dataId)` to load terrain meshes as a `Cesium3DTileset` [#12334](https://github.com/CesiumGS/cesium/pull/12334)
- Added `getSample` to `SampledProperty` to get the time of samples. [#12253](https://github.com/CesiumGS/cesium/pull/12253)
- Added `Entity.trackingReferenceFrame` property to allow tracking entities in various reference frames. [#12194](https://github.com/CesiumGS/cesium/pull/12194), [#12314](https://github.com/CesiumGS/cesium/pull/12314)
  - `TrackingReferenceFrame.AUTODETECT` (default): uses either VVLH or ENU depending on entity's dynamic. Use `TrackingReferenceFrame.ENU` if your camera orientation flips abruptly from time to time.
  - `TrackingReferenceFrame.ENU`: uses the entity's local East-North-Up reference frame.
  - `TrackingReferenceFrame.INERTIAL`: uses the entity's inertial reference frame.
  - `TrackingReferenceFrame.VELOCITY`: uses entity's `VelocityOrientationProperty` as orientation.
- Added `GoogleGeocoderService` for standalone usage of Google geocoder. [#12299](https://github.com/CesiumGS/cesium/pull/12299)

#### Breaking Changes :mega:

- `PostProcessStageCollection.ambientOcclusion` has been updated with a new algorithm to provide better results at all scales, with tunable performance cost. To approximate the appearance and performance of the old algorithm, set the following values for `scene.postProcessStages.ambientOcclusion.uniforms`: `{ lengthCap: 0.02, directionCount: 6, stepCount: 8 }`. For best results at long distances, consider setting `Viewer.camera.frustum.near` to `1.0` or more, to improve precision in the depth buffer. [#12316](https://github.com/CesiumGS/cesium/pull/12316)
- `Rectangle.validate` has been removed.

#### Fixes :wrench:

- Fixed bug where shared external textures from glTF files were not accounted for in resource statistics. [#12331](https://github.com/CesiumGS/cesium/pull/12331)
- Fixed lag or crashes when loading many models in the same frame. [#12320](https://github.com/CesiumGS/cesium/pull/12320)
- Fix point cloud filtering performance on certain hardware [#12317](https://github.com/CesiumGS/cesium/pull/12317)
- Fix label rendering bug in WebGL1 contexts. [#12301](https://github.com/CesiumGS/cesium/pull/12301)
- Updated WMS example URL in UrlTemplateImageryProvider documentation to use an active service. [#12323](https://github.com/CesiumGS/cesium/pull/12323)

#### Deprecated :hourglass_flowing_sand:

- `createGooglePhotorealistic3DTileset(key)` has been deprecated. Use `createGooglePhotorealistic3DTileset({key})` instead. It will be removed in 1.126.

### @cesium/widgets

#### Additions :tada:

- Added the ability to choose between Bing and Google geocoders. Updated `Viewer` constructor to also accept `IonGeocoderProvider` [#12299](https://github.com/CesiumGS/cesium/pull/12299)

#### Fixes :wrench:

- Added a `DeveloperError` when `globe` is set to `false` and a `baseLayer` is provided in `Viewer` options. This prevents errors caused by attempting to use a `baseLayer` without a globe. [#12274](https://github.com/CesiumGS/cesium/pull/12274)

## 1.123.1 - 2024-11-07

### @cesium/engine

#### Additions :tada:

- Added fallback diffuse lighting, `DynamicEnvironmentMapManager.DEFAULT_SPHERICAL_HARMONIC_COEFFICIENTS`, that is used when `DynamicEnvironmentMapManager` is disabled or unsupported. [#12292](https://github.com/CesiumGS/cesium/pull/12292)
- Added `DynamicEnvironmentMapManager.isDynamicUpdateSupported` to check if dynamic environment map updates are supported. [#12292](https://github.com/CesiumGS/cesium/pull/12292)

## 1.123 - 2024-11-01

### @cesium/engine

#### Breaking Changes :mega:

- Updated default 3D Tiles and Model lighting when using PBR in order to create a more realistic appearance. To approximate previous default lighting, use the following settings:

  ```js
  const environmentMapManager = model.environmentMapManager; // or tileset.environmentMapManager;
  environmentMapManager.saturation = 0.35;
  environmentMapManager.brightness = 1.4;
  environmentMapManager.gamma = 0.8;
  environmentMapManager.atmosphereScatteringIntensity = 5.0;
  environmentMapManager.groundColor =
    Cesium.Color.fromCssColorString("#001850");
  ```

- `ImageBasedLighting.luminanceAtZenith` has been removed. Use `DynamicEnvironmentMapManager.atmosphereScatteringIntensity` instead. [#12129](https://github.com/CesiumGS/cesium/pull/12129)
- Changed the default `Fog.density` from `0.0002` to `0.0006`. Set `viewer.scene.fog.density = 0.002` to return to the previous behavior. [#12248](https://github.com/CesiumGS/cesium/pull/12248)

#### Additions :tada:

- Updated default 3D Tiles and Model lighting when using PBR in order to create a more realistic appearance. Added `DynamicEnvironmentMapManager` to control lighting parameters. These can be accessed via `Cesium3DTileset.environmentMapManager` and `Model.environmentMapManager`. [#12129](https://github.com/CesiumGS/cesium/pull/12129)
- Added `ScreenSpaceCameraController.maximumTiltAngle` to limit how much the camera can tilt. [#12169](https://github.com/CesiumGS/cesium/pull/12169)
- Exposed `Fog.visualDensityScalar` to allow modifying the visual density of fog without affecting the culling aspects. Alongside this, the density calculation was adjusted to make it more smooth across heights. [#12248](https://github.com/CesiumGS/cesium/pull/12248)
- Update Japan Buildings sandcastle to use Japan Regional Terrain [#12259](https://github.com/CesiumGS/cesium/pull/12259)
- Moved `Viewer` functionality to `CesiumWidget` to increase usability, see the full list added to the `CesiumWidget` below. No functionality was removed from the `Viewer` but convenience helpers like the `entities` collection were added to the `CesiumWidget`. The `CesiumWidget` should be closer to a drop in replacement for the `Viewer` when not utilizing the extra Viewer widgets. [#11967](https://github.com/CesiumGS/cesium/issues/11967).
  - New constructor options: `options.shouldAnimate`, `options.automaticallyTrackDataSourceClocks`, `options.dataSources`
  - New properties: `dataSourceDisplay`, `entities`, `dataSources`, `allowDataSourcesToSuspendAnimation`, `trackedEntity`, `trackedEntityChanged`, `clockTrackedDataSource`
  - New functions: `zoomTo()`, `flyTo()`
- Update Bing Maps attribution link [#12265](https://github.com/CesiumGS/cesium/pull/12265)

#### Fixes :wrench:

- Fix flickering issue caused by bounding sphere retrieval being blocked by the bounding sphere of another entity. [#12230](https://github.com/CesiumGS/cesium/pull/12230)
- Fixed `ImageBasedLighting.imageBasedLightingFactor` not affecting lighting. [#12129](https://github.com/CesiumGS/cesium/pull/12129)
- Fix error with normalization of corner points for lines and corridors with collinear points. [#12255](https://github.com/CesiumGS/cesium/pull/12255)
- Properly handle `offset` and `scale` properties when picking metadata from property textures. [#12237](https://github.com/CesiumGS/cesium/pull/12237)

## 1.122 - 2024-10-01

### @cesium/engine

#### Additions :tada:

- Added `CallbackPositionProperty` to allow lazy entity position evaluation. [#12170](https://github.com/CesiumGS/cesium/pull/12170)
- Added `enableVerticalExaggeration` option to models. Set this value to `false` to prevent model exaggeration when `Scene.verticalExaggeration` is set to a value other than `1.0`. [#12141](https://github.com/CesiumGS/cesium/pull/12141)
- Added `Scene.prototype.pickMetadata` and `Scene.prototype.pickMetadataSchema`, enabling experimental support for picking property textures or property attributes [#12075](https://github.com/CesiumGS/cesium/pull/12075)
- Added experimental support for the `NGA_gpm_local` glTF extension, for GPM 1.2 [#12204](https://github.com/CesiumGS/cesium/pull/12204)

#### Fixes :wrench:

- Fix `Texture` errors when using a `HTMLVideoElement`. [#12219](https://github.com/CesiumGS/cesium/issues/12219)
- Fixed noise in ambient occlusion post process. [#12201](https://github.com/CesiumGS/cesium/pull/12201)
- Use first `geometryBuffer` if no best match found in I3SNode. [#12132](https://github.com/CesiumGS/cesium/pull/12132)
- Update type definitions throughout `Core/` to allow undefined for optional parameters. [#12193](https://github.com/CesiumGS/cesium/pull/12193)
- Reverts Firefox OIT temporary fix. [#4815](https://github.com/CesiumGS/cesium/pull/4815)

#### Deprecated :hourglass_flowing_sand:

- `Rectangle.validate` has been deprecated. It will be removed in 1.124.

## 1.121.1 - 2024-09-04

This is an npm-only release to extra source maps included in 1.121

## 1.121 - 2024-09-03

### @cesium/engine

#### Additions :tada:

- Enable MSAA by default with 4 samples. To turn MSAA off set `scene.msaaSamples = 1` [#12158](https://github.com/CesiumGS/cesium/pull/12158)
- Expose the `tonemapper` property of `PostProcessStageCollection` to allow changing the tonemap used when HDR is turned on. This defaults to the [PBR Neutral Tonemap from Khronos](https://github.com/KhronosGroup/ToneMapping/tree/main/PBR_Neutral) [#12160](https://github.com/CesiumGS/cesium/pull/12160)
  - The enum `Tonemapper` contains the list of valid tonemap options to use with the `tonemapper` setting
- Expose the `exposure` property of `PostProcessStageCollection` to allow changing the exposure used for the current HDR tonemap [#12160](https://github.com/CesiumGS/cesium/pull/12160)
- Added `WaterMask` globe material, which visualizes areas of water or land based on the terrain's water mask. [#12149](https://github.com/CesiumGS/cesium/pull/12149)
- Made the `time` parameter optional for `Property`, using `JulianDate.now()` as default. [#12099](https://github.com/CesiumGS/cesium/pull/12099)
- Exposes `ScreenSpaceCameraController.zoomFactor` to allow adjusting the zoom factor (speed). [#9145](https://github.com/CesiumGS/cesium/pull/9145)

#### Fixes :wrench:

- Update `CameraEventAggregator` to only trigger events for the currently held modifier while dragging. Events are canceled for all modifiers when the mouse is lifted. [#11903](https://github.com/CesiumGS/cesium/pull/11903)
- Fixed cube-mapping artifacts in image-based lighting. [#12100](https://github.com/CesiumGS/cesium/pull/12100)
- Fixed specular reflection artifact in PBR direct lighting. [#12116](https://github.com/CesiumGS/cesium/pull/12116)
- Added multiscattering terms to diffuse BRDF in image-based lighting. [#12118](https://github.com/CesiumGS/cesium/pull/12118)
- Fixed `CallbackProperty` type not being present on entity position. [#12120](https://github.com/CesiumGS/cesium/pull/12120)
- Additional TypeScript types export in `package.json` to assist some project configurations using Cesium. [#12122](https://github.com/CesiumGS/cesium/pull/12122)
- Fixed documentation about default values for Label origins [#12139](https://github.com/CesiumGS/cesium/pull/12139)

#### Breaking Changes :mega:

- Switched the default (non-HDR) tonemapping for models, atmosphere, and globe from ACES to [PBR Neutral Tonemap from Khronos](https://github.com/KhronosGroup/ToneMapping/tree/main/PBR_Neutral). The widens the gamut of possible colors, and provides more consistent color appearances across renderers. [#12160](https://github.com/CesiumGS/cesium/pull/12160)
- Switched the default tonemapper when HDR is turned _on_ from ACES to [PBR Neutral Tonemap from Khronos](https://github.com/KhronosGroup/ToneMapping/tree/main/PBR_Neutral). To preserve the previous behavior set `viewer.scene.postProcessStages.tonemapper = Cesium.Tonemapper.ACES;` [#12160](https://github.com/CesiumGS/cesium/pull/12160)
- `SceneTransforms.wgs84ToWindowCoordinates` has been removed. Use `SceneTransforms.worldToWindowCoordinates` instead.
- `SceneTransforms.wgs84ToDrawingBufferCoordinates` has been removed. Use `SceneTransforms.worldToDrawingBufferCoordinates` instead.
- Removed `jitter` option from `VoxelPrimitive.js`, `VoxelRenderResources.js`, and related test code in `VoxelPrimitiveSpec.js`. [#11913](https://github.com/CesiumGS/cesium/issues/11913)
- Custom specular environment maps in `ImageBasedLighting` now require either a WebGL2 context or a WebGL1 context that supports the [`EXT_shader_texture_lod` extension](https://registry.khronos.org/webgl/extensions/EXT_shader_texture_lod/).

## 1.120 - 2024-08-01

### @cesium/engine

#### Additions :tada:

- Added `Transforms.computeIcrfToMoonFixedMatrix` and `Transforms.computeMoonFixedToIcrfMatrix` to compute the transformations between the Moon's fixed frame and ICRF at a given time.
- Added `Transforms.computeIcrfToCentralBodyFixedMatrix` to specific the default ICRF to fixed frame transformation to use internally, including for lighting calculations.
- Added SplitDirection property for display PointPrimitive and Billboard relative to the `Scene.splitPosition`. [#11982](https://github.com/CesiumGS/cesium/pull/11982)

#### Fixes :wrench:

- Fixed environment map LOD selection in image-based lighting. [#12070](https://github.com/CesiumGS/cesium/pull/12070)
- Corrected calculation of diffuse component in image-based lighting. [#12082](https://github.com/CesiumGS/cesium/pull/12082)
- Updated specular BRDF for image-based lighting. [#12083](https://github.com/CesiumGS/cesium/pull/12083)
- Fixed environment map transform for image-based lighting. [#12091](https://github.com/CesiumGS/cesium/pull/12091)
- Updated geometric self-shadowing function to improve direct lighting on models using physically-based rendering. [#12063](https://github.com/CesiumGS/cesium/pull/12063)
- Prevent Bing Imagery API format issues from throwing errors [#12094](https://github.com/CesiumGS/cesium/pull/12094)

## 1.119 - 2024-07-01

### @cesium/engine

#### Additions :tada:

- Added `Ellipsoid.default` to allow a central place to specify a default ellipsoid value to be used throughout the API where an ellipsoid is not otherwise specified. [#4245](https://github.com/CesiumGS/cesium/issues/4245)
- Various defaults have been updated to adjust when `Ellipsoid.default` is changed to a value other than the WGS84 ellipsoid.
- Added `Scene.ellipsoid`, `CesiumWidget.ellipsoid`, and `Viewer.ellipsoid` to set the default ellipsoid used for rendering.
- Added `SkyBox.createEarthSkyBox` which creates a skybox instance with the default starmap for the Earth.
- Added support for the `scale` property of a normal texture in a glTF material. [#12018](https://github.com/CesiumGS/cesium/pull/12018)

#### Fixes :wrench:

- Fixed diffuse color calculation for PBR materials. Many models will now appear slightly brighter. [#12043](https://github.com/CesiumGS/cesium/pull/12043)
- Fixed the calculation of base color in materials using the KHR_materials_specular extension [#12041](https://github.com/CesiumGS/cesium/issues/12041).
- Fixed issue where Entities would not use a custom ellipsoid. [#3543](https://github.com/CesiumGS/cesium/issues/3543)
- Adjusted spacing for on screen Credits and updated recommendations for positioning custom ones. [#11912](https://github.com/CesiumGS/cesium/issues/11912)
- Fixed issue where Property 'availability' is missing in type 'CustomHeightmapTerrainProvider' but required in type 'TerrainProvider' when using with typescript

#### Breaking Changes :mega:

- `CircleGeometry.unpack` now defaults to `Ellipsoid.default` rather than `Ellipsoid.UNIT_SPHERE`.

#### Deprecated :hourglass_flowing_sand:

- `SceneTransforms.wgs84ToDrawingBufferCoordinates` has been deprecated. It will be removed in 1.121. Use `SceneTransforms.worldToDrawingBufferCoordinates` instead.
- `SceneTransforms.wgs84ToWindowCoordinates` has been deprecated. It will be removed in 1.121. Use `SceneTransforms.worldToWindowCoordinates` instead.

### @cesium/widgets

#### Breaking Changes :mega:

- `BaseLayerPicker` no longer overrides the default imagery or terrain unless `options.selectedImageryProviderViewModel` or `options.selectedTerrainProviderViewModel` is provided respectively.

## 1.118.2 - 2024-06-03

This is an npm-only release to fix a dependency issue published in 1.118.1

## 1.118.1 - 2024-06-03

This is an npm-only release to fix a dependency issue published in 1.118

## 1.118 - 2024-06-03

### @cesium/engine

#### Additions :tada:

- Added support for glTF models with the [KHR_materials_specular extension](https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_materials_specular). [#11970](https://github.com/CesiumGS/cesium/pull/11970)
- Added support for glTF models with the [KHR_materials_anisotropy extension](https://github.com/KhronosGroup/glTF/blob/main/extensions/2.0/Khronos/KHR_materials_anisotropy/README.md). [#11988](https://github.com/CesiumGS/cesium/pull/11988)
- Added support for glTF models with the [KHR_materials_clearcoat extension](https://github.com/KhronosGroup/glTF/blob/main/extensions/2.0/Khronos/KHR_materials_clearcoat/README.md). [#12006](https://github.com/CesiumGS/cesium/pull/12006)

#### Fixes :wrench:

- Fixed a bug where `scene.pickPosition` returned incorrect results against the globe when `depthTestAgainstTerrain` is `false`. [#4368](https://github.com/CesiumGS/cesium/issues/4368)
- Fixed a bug where `TaskProcessor` worker loading would check the worker module ID rather than the absolute URL when determining if it is cross-origin. [#11833](https://github.com/CesiumGS/cesium/pull/11833)
- Fixed a bug where cross-origin workers would error when loaded with the CommonJS `importScripts` shim instead of an ESM `import`. [#11833](https://github.com/CesiumGS/cesium/pull/11833)
- Fixed an error in the specular reflection calculations for image-based lighting from supplied environment maps. [#12008](https://github.com/CesiumGS/cesium/issues/12008)
- Fixed a normalization error in image-based lighting. [#11994](https://github.com/CesiumGS/cesium/issues/11994)
- Fixes a bug where `sampleTerrain` did not respect the `rejectOnTileFail` flag for failed requests other than the first. [#11998](https://github.com/CesiumGS/cesium/pull/11998)
- Corrected the Typescript types for `Billboard.id` and `Label.id` to be `any` [#11973](https://github.com/CesiumGS/cesium/issues/11973)

## 1.117 - 2024-05-01

### @cesium/engine

#### Additions :tada:

- Added `ClippingPolygon` and `ClippingPolygonCollection` for applying multiple clipping regions, with support for concave regions and inverse clipping regions, to 3D Tiles and Terrain. [#11750](https://github.com/CesiumGS/cesium/pull/11750)
- Added `Cesium3DTileset.clippingPolygons`, `Globe.clippingPolygons`, and `Model.clippingPolygons` properties for defining clipping regions from world positions. [#11750](https://github.com/CesiumGS/cesium/pull/11750)

#### Fixes :wrench:

- Fixed a bug where a data source was not automatically rendered after is was added in request render mode. [#11934](https://github.com/CesiumGS/cesium/pull/11934)
- Fixes Typescript definition for `Event.raiseEvent`. [#10498](https://github.com/CesiumGS/cesium/issues/10498)
- Fixed a bug that Label position height may not be correctly updated when its HeightReference is relative. [#11929](https://github.com/CesiumGS/cesium/pull/11929)

### @cesium/widgets

#### Fixes :wrench:

- Fixed leaked CSS styling from `I3SBuildingSceneLayerExplorer` widget. [#11959](https://github.com/CesiumGS/cesium/pull/11959)

## 1.116 - 2024-04-01

### @cesium/engine

#### Breaking Changes :mega:

- `Cesium3DTileset.disableCollision` has been removed. Use `Cesium3DTileset.enableCollision` instead.
- `Globe.terrainExaggeration` and `Globe.terrainExaggerationRelativeHeight` have been removed. Use `Scene.verticalExaggeration` and `Scene.verticalExaggerationRelativeHeight` instead.

#### Additions :tada:

- Surface normals are now computed for clipping and shape bounds in VoxelEllipsoidShape and VoxelCylinderShape. [#11847](https://github.com/CesiumGS/cesium/pull/11847)
- Implemented sharper rendering and lighting on voxels with CYLINDER and ELLIPSOID shape. [#11875](https://github.com/CesiumGS/cesium/pull/11875)
- Implemented vertical exaggeration for voxels with BOX shape. [#11887](https://github.com/CesiumGS/cesium/pull/11887)
- Added the `Check` object of validators to the public api and types. [#11901](https://github.com/CesiumGS/cesium/pull/11901)

#### Fixes :wrench:

- Fixed issue with `BingMapsImageryProvider` where given culture option is ineffective [#11695](https://github.com/CesiumGS/cesium/issues/11695)
- Fixed a bug with performance in scenes with multiple tilesets [#11878](https://github.com/CesiumGS/cesium/pull/11878)
- Fixes issue with PolygonGeometry uvs are improperly computed [#11767](https://github.com/CesiumGS/cesium/issues/11767)
- Fixed voxel rendering bugs for non-spherical ellipsoid shapes [#11848](https://github.com/CesiumGS/cesium/pull/11848)
- Fixed a bug where dynamic geometries caused the Scene to continuously render when running in requestRenderMode [#6631](https://github.com/CesiumGS/cesium/issues/6631)

## 1.115 - 2024-03-01

### @cesium/engine

#### Breaking Changes :mega:

- By default, instances of `Cesium3DTileset` will no longer default to enable collisions for camera collision or for clamping entities. [#11829](https://github.com/CesiumGS/cesium/pull/11829)
  - This behavior can be enabled by setting `Cesium3DTileset.enableCollision` to true.

#### Additions :tada:

- Added support for I3S Building Scene Layer. [#11678](https://github.com/CesiumGS/cesium/pull/11678)
- Added `Scene.pickVoxel` to pick individual cells from a `VoxelPrimitive`, and `VoxelCell` to report information about the picked cell. [#11828](https://github.com/CesiumGS/cesium/pull/11828)
- Added `Scene.defaultLogDepthBuffer` to allow changing the default behavior of the `logDepthBuffer` for newly created `Scene` instances. [#11859](https://github.com/CesiumGS/cesium/pull/11859)
- Added `SensorVolumePortionToDisplay` to assist `CzmlDataSource` in parsing CZML. [#11859](https://github.com/CesiumGS/cesium/pull/11859)

#### Fixes :wrench:

- Fixed a bug where the camera can stay underground when 3D Tiles are loading in. [#11824](https://github.com/CesiumGS/cesium/issues/11824)
- Fixed a bug with where a mix of empty and non-empty tiles were not refining. [#9356](https://github.com/CesiumGS/cesium/issues/9356)
- Fixed a bug with camera collision with tilesets containing tiles with interleaved buffers [#11812](https://github.com/CesiumGS/cesium/issues/11812)
- Fixed a bug affecting voxel shader compilation in WebGL1 contexts. [#11798](https://github.com/CesiumGS/cesium/pull/11798)
- Fixed a bug where legacy B3DM files that contained glTF 1.0 data that used a `CONSTANT` technique in the `KHR_material_common` extension and only defined ambient- or emissive textures (but no diffuse textures) showed up without any texture [#11825](https://github.com/CesiumGS/cesium/pull/11825)
- Fixed an error when the `screenSpaceEventHandler` was destroyed before `Viewer` [#10576](https://github.com/CesiumGS/cesium/issues/10576)
- Fixed how `Camera.changed` handles changes in `roll`. [#11844](https://github.com/CesiumGS/cesium/pull/11844)

#### Deprecated :hourglass_flowing_sand:

- `Cesium3DTileset.disableCollision` has been deprecated and will be removed in 1.116. Use `Cesium3DTileset.enableCollision` instead.

### @cesium/widgets

#### Additions :tada:

- Added `I3SBuildingSceneLayerExplorer` widget for working with I3S Building Scene Layer data. [#11678](https://github.com/CesiumGS/cesium/pull/11678)

## 1.114 - 2024-02-01

### @cesium/engine

#### Breaking Changes :mega:

- By default, the screen space camera controller will no longer go inside or under instances of `Cesium3DTileset`. [#11581](https://github.com/CesiumGS/cesium/pull/11581)
  - This behavior can be disabled by setting `Cesium3DTileset.disableCollision` to true.
  - This feature is enabled by default only for WebGL 2 and above, but can be enabled for WebGL 1 by setting the `enablePick` option to true when creating the `Cesium3DTileset`.
- Clamping to ground, `HeightReference.CLAMP_TO_GROUND`, and `HeightReference.RELATIVE_TO_GROUND` now take into account 3D Tilesets. These options will clamp to either 3D Tilesets or Terrain, whichever has a greater height. [#11604](https://github.com/CesiumGS/cesium/pull/11604)
  - To restore previous behavior where an entity is clamped only to terrain or relative only to terrain, set `heightReference` to `HeightReference.CLAMP_TO_TERRAIN` or `HeightReference.RELATIVE_TO_TERRAIN` respectively.
- Removed the need for node internal packages `http`, `https`, `url` and `zlib` in the `Resource` class. This means they do not need to be marked external by build tools anymore. [#11773](https://github.com/CesiumGS/cesium/pull/11773)
  - This slightly changed the contents of the `RequestErrorEvent` error that is thrown in node environments when a request fails. The `response` property is now a [`Response`](https://developer.mozilla.org/en-US/docs/Web/API/Response) object instead of an [`http.IncomingMessage`](https://nodejs.org/docs/latest-v20.x/api/http.html#class-httpincomingmessage)
- The `Cesium3DTileset.dynamicScreenSpaceError` optimization is now enabled by default, as this improves performance for street-level horizon views. Furthermore, the default settings of this feature were tuned for improved performance. `Cesium3DTileset.dynamicScreenSpaceErrorDensity` was changed from 0.00278 to 0.0002. `Cesium3DTileset.dynamicScreenSpaceErrorFactor` was changed from 4 to 24. [#11718](https://github.com/CesiumGS/cesium/pull/11718)
- `PolygonGeometry.computeRectangle` has been removed. Use `PolygonGeometry.computeRectangleFromPositions` instead.

#### Additions :tada:

- Added `HeightReference.CLAMP_TO_TERRAIN`, `HeightReference.RELATIVE_TO_TERRAIN`, `HeightReference.CLAMP_TO_3D_TILE`, and `HeightReference.RELATIVE_TO_3D_TILE` to position relative to terrain or 3D tilesets exclusively.[#11604](https://github.com/CesiumGS/cesium/pull/11604)
- Added `Cesium3DTileset.getHeight` to sample height values of the loaded tiles. If using WebGL 1, the `enablePick` option must be set to true to use this function. [#11581](https://github.com/CesiumGS/cesium/pull/11581)
- Added `Cesium3DTileset.disableCollision` to allow the camera from to go inside or below a 3D tileset, for instance, to be used with 3D Tiles interiors. [#11581](https://github.com/CesiumGS/cesium/pull/11581)
- Fog rendering now applies to glTF models and 3D Tiles. This can be configured using `scene.fog` and `scene.atmosphere`. [#11744](https://github.com/CesiumGS/cesium/pull/11744)
- Added `scene.atmosphere` to store common atmosphere lighting parameters. [#11744](https://github.com/CesiumGS/cesium/pull/11744) and [#11681](https://github.com/CesiumGS/cesium/issues/11681)
- Added `createWorldBathymetryAsync` helper function to make it easier to load Bathymetry terrain. [#11790](https://github.com/CesiumGS/cesium/issues/11790)

#### Fixes :wrench:

- Fixed an issue where `DataSource` objects incorrectly shared a single `PolylineCollection` in the `PolylineGeometryUpdater`. Updated `PolylineGeometryUpdater` to create a distinct `PolylineCollection` instance per `DataSource`. This resolves the crashes reported under [#7758](https://github.com/CesiumGS/cesium/issues/7758) and [#9154](https://github.com/CesiumGS/cesium/issues/9154).
- Fixed a geometry displacement on iOS devices that was caused by NaN value in `czm_translateRelativeToEye` function. [#7100](https://github.com/CesiumGS/cesium/issues/7100)
- Fixed improper scaling of ellipsoid inner radii in 3D mode. [#11656](https://github.com/CesiumGS/cesium/issues/11656) and [#10245](https://github.com/CesiumGS/cesium/issues/10245)
- Updated `approximateTerrainHeights.json` to account for CWB heights to help with ground primitives when using Cesium World Bathymetry [#11805](https://github.com/CesiumGS/cesium/pull/11805)
- Fix globe materials when lighting is false. Slope/Aspect material no longer rely on turning on lighting or shadows. [#11563](https://github.com/CesiumGS/cesium/issues/11563)
- Fixed a bug where `GregorianDate` constructor would not validate the input parameters for valid date. [#10057](https://github.com/CesiumGS/cesium/issues/10057)
- Fixed a bug where the `Cesium3DTileset` constructor was ignoring the options `dynamicScreenSpaceError`, `dynamicScreenSpaceErrorDensity`, `dynamicScreenSpaceErrorFactor` and `dynamicScreenSpaceErrorHeightFalloff`. [#11677](https://github.com/CesiumGS/cesium/issues/11677)
- Fixed a bug where transforms that had been defined with the `KHR_texture_transform` extension had not been applied to Property Textures in `EXT_structural_metadata`. [#11708](https://github.com/CesiumGS/cesium/issues/11708)
- Fixed a bug where transforms that had been defined with the `KHR_texture_transform` extension had not been applied to Feature ID Textures in `EXT_mesh_features`. [#11731](https://github.com/CesiumGS/cesium/issues/11731)
- Fixed `Entity` documentation for `orientation` property. [#11762](https://github.com/CesiumGS/cesium/pull/11762)
- The `EntityCollection#add` method was documented to throw a `DeveloperError` for duplicate IDs, but did throw a `RuntimeError` in this case. This is now changed to throw a `DeveloperError`. [#11776](https://github.com/CesiumGS/cesium/pull/11776)
- Parts of the documentation have been updated to resolve potential issues with the generated TypedScript definitions. [#11776](https://github.com/CesiumGS/cesium/pull/11776)
- Fixed type definition for `Camera.constrainedAxis`. [#11475](https://github.com/CesiumGS/cesium/issues/11475)

### @cesium/widgets

#### Fixes :wrench:

- Fixed a bug where the 3D Tiles Inspector's `dynamicScreenSpaceErrorDensity` slider did not update the tileset [#6143](https://github.com/CesiumGS/cesium/issues/6143)

## 1.113 - 2024-01-02

### @cesium/engine

#### Additions :tada:

- Vertical exaggeration can now be applied to a `Cesium3DTileset`. Exaggeration of `Terrain` and `Cesium3DTileset` can be controlled simultaneously via the new `Scene` properties `Scene.verticalExaggeration` and `Scene.verticalExaggerationRelativeHeight`. [#11655](https://github.com/CesiumGS/cesium/pull/11655)

#### Fixes :wrench:

- Changes the default `RequestScheduler.maximumRequestsPerServer` from 6 to 18. This should improve performance on HTTP/2 servers and above. [#11627](https://github.com/CesiumGS/cesium/issues/11627)
- Corrected JSDoc and Typescript definitions that marked optional arguments as required in `ImageryProvider` constructor. [#11625](https://github.com/CesiumGS/cesium/issues/11625)
- The `Quaternion.computeAxis` function created an axis that was `(0,0,0)` for the unit quaternion, and an axis that was `(NaN,NaN,NaN)` for the quaternion `(0,0,0,-1)` (which describes a rotation about 360 degrees). Now, it returns the x-axis `(1,0,0)` in both of these cases. [#11665](https://github.com/CesiumGS/cesium/issues/11665)

#### Deprecated :hourglass_flowing_sand:

- `Globe.terrainExaggeration` and `Globe.terrainExaggerationRelativeHeight` have been deprecated in CesiumJS 1.113. They will be removed in 1.116. Use `Scene.verticalExaggeration` and `Scene.verticalExaggerationRelativeHeight` instead. [#11655](https://github.com/CesiumGS/cesium/pull/11655)

## 1.112 - 2023-12-01

### @cesium/engine

#### Fixes :wrench:

- Fixed terrain lockups in `requestTileGeometry` by ensuring promise handling aligns with CesiumJS's expectations. [#11630](https://github.com/CesiumGS/cesium/pull/11630)
- Corrected JSDoc and Typescript definitions that marked optional arguments as required in `Cesium3dTileset.fromIonAssetId` [#11623](https://github.com/CesiumGS/cesium/issues/11623), and `IonImageryProvider.fromAssetId` [#11624](https://github.com/CesiumGS/cesium/issues/11624)

## 1.111 - 2023-11-01

### @cesium/engine

#### Additions :tada:

- `BingMapsImageryProvider.fromUrl` now takes an optional `mapLayer` parameter which is a string that maps directly to the [mapLayer template parameters](https://learn.microsoft.com/en-us/bingmaps/rest-services/imagery/get-imagery-metadata#template-parameters) specified in the Bing Maps documentation.

#### Fixes :wrench:

- By default, `createGooglePhotorealistic3DTileset` no longer shows credits on screen but links to them instead, as this is compliant with the minimum required attribution. To r