cesium/CHANGES.md

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

# Change Log

## 1.140 - 2026-04-01

### @cesium/engine

#### Breaking Changes :mega:

- Billboards and labels now require device support for WebGL 2, or WebGL 1 with ANGLE_instanced_arrays and MAX_VERTEX_TEXTURE_IMAGE_UNITS > 0. [#13053](https://github.com/CesiumGS/cesium/issues/13053) [#13253](https://github.com/CesiumGS/cesium/pull/13253)

#### Additions :tada:

- Added experimental, performance-focused vector primitive APIs: `BufferPointCollection`, `BufferPolylineCollection`, and `BufferPolygonCollection`. [#13212](https://github.com/CesiumGS/cesium/pull/13212)
- Added support for Reality Data of type `ITwinPlatform.RealityDataType.GaussianSplat3DTiles` to `ITwinData.createTilesetForRealityDataId`. [#13208](https://github.com/CesiumGS/cesium/pull/13208)
- Added GetFeatureInfo support to `WebMapTileServiceImageryProvider`, enabling `WebMapTileServiceImageryProvider.pickFeatures` for both KVP and RESTful WMTS services. New class parameters include `enablePickFeatures`, `getFeatureInfoFormats`, `getFeatureInfoUrl`, and `getFeatureInfoParameters`. [#13196](https://github.com/CesiumGS/cesium/pull/13196)
- Added limited support (via downcasting) for double-precision metadata types in custom shaders. [#13323](https://github.com/CesiumGS/cesium/pull/13323)
- Added a new experimental property `PathGraphics.relativeTo` which allows entity `PathGraphics` to be displayed in a reference frame relative to another entity, or a different reference frame than the entity's `Position.ReferenceFrame`. [#13223](https://github.com/CesiumGS/cesium/pull/13223)

#### Fixes :wrench:

- Fixed intermittent label text/background misalignment when using `heightReference` (CLAMP_TO_GROUND, CLAMP_TO_TERRAIN, or CLAMP_TO_TILE). [#13335](https://github.com/CesiumGS/cesium/pull/13335)
- Fixed a crash when decoding large Gaussian splat SPZ files with high spherical harmonics degree. [#13287](https://github.com/CesiumGS/cesium/pull/13287)
- Fixed Gaussian splat `modelMatrix` not being correctly applied to splat positions, rotations, and scales when the tileset transform changes. Fix spherical harmonic view direction being evaluated in the wrong coordinate frame in Gaussian splat rendering, causing subtle color errors for datasets without an embedded axis-compensation matrix. [#13305](https://github.com/CesiumGS/cesium/pull/13305)
- Fixed a WebGL crash when rendering Gaussian splat tilesets with more than ~16 million splats. [#13235](https://github.com/CesiumGS/cesium/pull/13235)
- Fixed memory leak when rendering Gaussian splat 3D tilesets. [#13229](https://github.com/CesiumGS/cesium/pull/13229/)
- No longer disables custom shaders for primitives with missing metadata, as long as the metadata exists on the overall class definition. [#13258](https://github.com/CesiumGS/cesium/pull/13258)
- Fixed `SkyBox.show` being ignored when set to `false`. [#13315](https://github.com/CesiumGS/cesium/pull/13315)
- Fix performance issue with multiple ClippingPolygon on Cesium3DTileset. [#13255](https://github.com/CesiumGS/cesium/pull/13255)
- Improved Gaussian splat loading and update performance by reducing transform work, reusing aggregate buffers, and lowering repeated sort churn during camera movement. [#13322](https://github.com/CesiumGS/cesium/pull/13322)
- Improved Gaussian splat SPZ decode performance by updating `@spz-loader/core` to `0.3.1`. [#13329](https://github.com/CesiumGS/cesium/pull/13329)
- ClippingPolygonCollection performance and quality improvements. [#13308](https://github.com/CesiumGS/cesium/pull/13308)
- Fixed incorrect min and max values for accessors in decodeI3S.js.[#13280](https://github.com/CesiumGS/cesium/pull/13280)
- Fixed camera zoom behavior when the camera transform is set (for example, when tracking entities or using `lookAt`). [#12999](https://github.com/CesiumGS/cesium/pull/12999)
- Fixed voxel raymarcher skipping zero step size when shape is infinitely thin. [#13257](https://github.com/CesiumGS/cesium/pull/13257)
- Fixed regression with point cloud custom styling when using `evaluate`. [#13346](https://github.com/CesiumGS/cesium/issues/13346)

### @cesium/sandcastle

#### Fixes :wrench:

- Performance and UX improvements for semantic search. Adjusted debounce time for semantic search to reduce results slightly less frequently (after 300ms instead of 100ms). Pagefind search now waits for semantic search to complete to reduce the number of visual updates to the gallery. [#13317](https://github.com/CesiumGS/cesium/pull/13317)
- Fixed an issue with globby not reading Windows paths correctly [#13317](https://github.com/CesiumGS/cesium/pull/13317)

## 1.139.1 - 2026-03-05

### @cesium/engine

#### Fixes :wrench:

- Fixes a regression with the NGA-GPM local extension and custom shaders. [#13247](https://github.com/CesiumGS/cesium/pull/13247)
- Fixes a non-invertible matrix crash when zooming into globe without collision detection enabled [#13078](https://github.com/CesiumGS/cesium/issues/13078)

### @cesium/sandcastle

#### Fixes :wrench:

- Fixed split screen labels and Cartesian3 factory function calls, and edited descriptions for various gallery examples. [#13250](https://github.com/CesiumGS/cesium/pull/13250)

## 1.139 - 2026-03-02

### @cesium/engine

#### Breaking Changes :mega:

- Fixed precision of point cloud attributes when accessed in a custom fragment shader. [#13170](https://github.com/CesiumGS/cesium/pull/13170)
- Cartesian2, Cartesian3, and Cartesian4 are now [ES6 Classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes). This change should have no impact on most users, but note that using `new` on a static factory method, like `new Cartesian3.fromArray(...)`, will now throw an error. Omit `new` unless you are invoking a constructor directly, for these and all other factory methods, as more classes will be migrated to ES6 Classes soon. [#8359](https://github.com/CesiumGS/cesium/issues/8359)
- [Custom Shaders](https://cesium.com/learn/cesiumjs/ref-doc/CustomShader.html?classFilter=customsh) that rely on metadata derived from the [EXT_structural_metadata extension](https://github.com/CesiumGS/glTF/tree/proposal-EXT_structural_metadata/extensions/2.0/Vendor/EXT_structural_metadata) no longer cast
  unsigned integer metadata types to signed integers. Any existing custom shaders that assign UINT-type metadata to local integers (e.g. `int myMetadata = vsInput.metadata.myUintMetadata`) will no longer compile. Variable assignments must be changed to reflect the underlying signedness of the metadata type.
  [#13135](https://github.com/CesiumGS/cesium/pull/13135)

#### Additions :tada:

- Added panorama support via new `EquirectangularPanorama` and `CubeMapPanorama` classes, along with `GoogleStreetViewCubeMapPanoramaProvider` for loading cube map faces from the Google Street View Static API and rendering them in a cube map panorama. [#13153](https://github.com/CesiumGS/cesium/pull/13153/)
- Added more depth testing options for billboards and labels with `BillboardCollection.coarseDepthTestDistance`, `BillboardCollection.threePointDepthTestDistance`, `LabelCollection.coarseDepthTestDistance`, and `LabelCollection.threePointDepthTestDistance`. [#12994](https://github.com/CesiumGS/cesium/pull/12994)
- Added support for more metadata types via property textures in custom shaders. See this [issue](https://github.com/CesiumGS/cesium/issues/10248) for the current state of supported types. [#13135](https://github.com/CesiumGS/cesium/pull/13135)
- Added support for accessing metadata from property tables (from the [EXT_structural_metadata extension](https://github.com/CesiumGS/glTF/tree/proposal-EXT_structural_metadata/extensions/2.0/Vendor/EXT_structural_metadata)) in [custom shaders](https://cesium.com/learn/cesiumjs/ref-doc/CustomShader.html?classFilter=customsh). [#13124](https://github.com/CesiumGS/cesium/issues/13124)
- Added `AttributeCompression.encodeRGB8` and `decodeRGB8` for packing colors. [#13174](https://github.com/CesiumGS/cesium/pull/13174)

#### Fixes :wrench:

- Fixed Gaussian splat race conditions in snapshot/sort updates by enforcing explicit snapshot states, preventing stale async results from causing flickering, WebGL draw errors, and unstable LOD transition performance. [#13016](https://github.com/CesiumGS/cesium/pull/13016) [#12965](https://github.com/CesiumGS/cesium/pull/12965)
- Fixed flashing when rendering multiple Gaussian splat primitives by storing draw-command model matrices per primitive (`_drawCommandModelMatrix`). [#12967]
- Fixed depth-testing when `Billboard.disableDepthTestDistance` is `0`. [#13150]
- Fixed billboard depth testing near horizon. [#13159]
- Fixed shader cache lookup for day/night alpha in Columbus View. [#13216]
- Fixed precision of point cloud attributes when accessed in a custom fragment shader. [#13170]
- Fixed a point-rendering regression which caused points to render as circles rather than squares. Such points now will only render as circles when their width is specified via the [BENTLEY_materials_point_style](https://github.com/CesiumGS/glTF/pull/91) glTF extension. [#13217]
- Fixed a coordinate switching bug in `OpenCageGeocoderService`. [#13138]
- Fixed a regex expression used to find metadata variables in `CustomShader`s, and extended it to work with `metadataClass` and `metadataStatistics`. [#13231]

### @cesium/sandcastle

- Modified Sandcastle application to use a hybrid text and semantic, embedding based search. [#13090](https://github.com/CesiumGS/cesium/pull/13090)
- Updated Sandcastle Gallery creation process to leverage MIT licensed Huggingface model to vectorize each sandcastle for embedding search. [#13090](https://github.com/CesiumGS/cesium/pull/13090)
- Further separated the viewer from the rest of the app to enable running them on separate origins. [#13154](https://github.com/CesiumGS/cesium/pull/13154)

## 1.138 - 2026-02-02

### @cesium/engine

#### Fixes :wrench:

- Fixed jitter artifacts on Intel Arc GPUs. [#12879](https://github.com/CesiumGS/cesium/issues/12879)
- Improved voxel memory usage by reworking `Megatexture` to use `Texture3D`. [#12570](https://github.com/CesiumGS/cesium/issues/12570)
- Fixed multiple issues causing undefined pick results in 2D/CV scene modes. [#13083](https://github.com/CesiumGS/cesium/issues/13083)
- Fixed label sizing for some fonts and characters. [#9767](https://github.com/CesiumGS/cesium/issues/9767)
- Fixed a type error when accessing the ellipsoid of a viewer. [#13123](https://github.com/CesiumGS/cesium/pull/13123)
- Fixed a bug where entities have not been clustered correctly. [#13064](https://github.com/CesiumGS/cesium/pull/13064)
- Fixed error with `DynamicEnvironmentMapManager` when `ContextLimits.maximumCubeMapSize` is zero. [#12606](https://github.com/CesiumGS/cesium/pull/12606)

## 1.137 - 2026-01-05

### @cesium/engine

#### Fixes :wrench:

- Fixes label positioning in workflows that delete and recreate clamped labels [#12949](https://github.com/CesiumGS/cesium/issues/12949)
- Fixes texture coordinates in large billboard collections [#13042](https://github.com/CesiumGS/cesium/pull/13042)

#### Deprecated :hourglass_flowing_sand:

- Beginning in CesiumJS 1.140, billboards and labels will require device support for WebGL 2, or WebGL 1 with ANGLE_instanced_arrays and MAX_VERTEX_TEXTURE_IMAGE_UNITS > 0. For more information or to share feedback, please see [#13053](https://github.com/CesiumGS/cesium/issues/13053). [#13067](https://github.com/CesiumGS/cesium/issues/13067)

#### Additions :tada:

- Added support for the proposed [BENTLEY_materials_point_style](https://github.com/CesiumGS/glTF/pull/91) glTF extension. This allows point primitives to have a diameter property specified and respected when loaded via glTF.
- Added support for the proposed [BENTLEY_materials_line_style](https://github.com/CesiumGS/glTF/pull/89) glTF extension. This enables CAD-style line visualization with variable width and dash patterns. Lines and edges can now have customizable `width` (in screen pixels) and `pattern` (16-bit repeating on/off pattern) properties when loaded via glTF.
- Refactored `EXT_mesh_primitive_edge_visibility` implementation to use quad-based rendering instead of `gl_line` primitives. This enables variable line width support, as WebGL does not support line widths greater than 1. Each edge is now tessellated into a quad (4 vertices, 2 triangles) that expands perpendicular to the edge direction based on the material's width property.

## 1.136 - 2025-12-01

### @cesium/engine

#### Fixes :wrench:

- Improved scaling of SVGs in billboards [#13020](https://github.com/CesiumGS/cesium/pull/13020)
- Billboards using `imageSubRegion` now render as expected. [#12585](https://github.com/CesiumGS/cesium/issues/12585)
- Fixed depth testing bug with billboards and labels clipping through models [#13012](https://github.com/CesiumGS/cesium/issues/13012)
- Fixed unexpected outline artifacts around billboards [#4525](https://github.com/CesiumGS/cesium/issues/4525)

#### Additions :tada:

- Added `scene.pickAsync` for non GPU blocking picking using WebGL2 [#12983](https://github.com/CesiumGS/cesium/pull/12983)
- Improves performance of terrain picks via new terrain picking quadtrees [#8481](https://github.com/CesiumGS/cesium/issues/8481)

## 1.135 - 2025-11-03

### @cesium/engine

#### Breaking Changes :mega:

- Removed 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`. Please re-tile existing Gaussian splatting 3D Tiles [#12837](https://github.com/CesiumGS/cesium/issues/12837)
- `scene.drillPick` now uses a breadth-first search strategy instead of depth-first. This may change which entities are picked when using large values of `width` and `height` when providing a `limit`, prioritizing entities closer to the camera. [#12916](https://github.com/CesiumGS/cesium/pull/12916)

#### Additions :tada:

- Added experimental support for loading 3D Tiles as terrain, via `Cesium3DTilesTerrainProvider`. See [the PR](https://github.com/CesiumGS/cesium/pull/12963) for limitations on the types of 3D Tiles that can be used. [#12296](https://github.com/CesiumGS/cesium/issues/12296)
- Added support for [EXT_mesh_primitive_edge_visibility](https://github.com/KhronosGroup/glTF/pull/2479) glTF extension. [#12765](https://github.com/CesiumGS/cesium/issues/12765)
- Extended edge visibility loading to honor material colors and line-string overrides from EXT_mesh_primitive_edge_visibility.

#### Fixes :wrench:

- Improved performance of `scene.drillPick`. [#12916](https://github.com/CesiumGS/cesium/pull/12916)
- Improved performance when removing primitives. [#3018](https://github.com/CesiumGS/cesium/pull/3018)
- Improved performance of terrain Quadtree handling of custom data [#12907](https://github.com/CesiumGS/cesium/pull/12907)
- Fixed vertical exaggeration of ellipsoid-shaped voxels. [#12811](https://github.com/CesiumGS/cesium/issues/12811)
- Fixed parsing content bounding volumes contained in 3D Tiles 1.1 subtree files. [#12972](https://github.com/CesiumGS/cesium/pull/12972)
- Fixes an event bug following recent changes, where adding a new listener during an event callback caused an infinite loop. [#12955](https://github.com/CesiumGS/cesium/pull/12955)
- Fix issues with label background when updating properties while `label.show` is `false`. [#12138](https://github.com/CesiumGS/cesium/issues/12138)
- Fixed picking of `GroundPrimitive` with multiple `PolygonGeometry` instances selecting the wrong instance. [#12978](https://github.com/CesiumGS/cesium/pull/12978)
- Fixed a bug where the removal of draped imagery layers did not update the rendered state [#12923](https://github.com/CesiumGS/cesium/issues/12923)
- Fixed precision issues with Gaussian splat tilesets where the root tile does not have a world transform. [#12925](https://github.com/CesiumGS/cesium/issues/12925)
- Fixed infinite recursion that would happen if user append post-render callbacks within existing callbacks [#12983](https://github.com/CesiumGS/cesium/pull/12983)

## 1.134.1 - 2025-10-10

### @cesium/engine

#### Fixes :wrench:

- Fixed an event bug following recent changes, where adding a new listener during an event callback caused an infinite loop. [#12955](https://github.com/CesiumGS/cesium/pull/12955)

## 1.134 - 2025-10-01

- [Sandcastle](https://sandcastle.cesium.com/) has been updated at `https://sandcastle.cesium.com`! The [legacy Sandcastle app](https://cesium.com/downloads/cesiumjs/releases/1.134/Apps/Sandcastle/index.html) will remain available through November 3, 2025.

### @cesium/engine

#### Breaking Changes :mega:

- Voxel rendering now requires a WebGL2 context, which is [enabled by default since 1.101](https://github.com/CesiumGS/cesium/pull/10894). Make sure the `requestWebGl1` flag in `contextOptions` is NOT set to true.
- The `defaultValue` function has been removed. Instead, use 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 removed. 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.

#### Additions :tada:

- Added Google2DImageryProvider to load imagery from [Google Maps](https://developers.google.com/maps/documentation/tile/2d-tiles-overview) [#12913](https://github.com/CesiumGS/cesium/pull/12913)
- Added an async factory method for the Material class that allows callers to wait on resource loading. [#10566](https://github.com/CesiumGS/cesium/issues/10566)

#### Fixes :wrench:

- Fixed vertical misalignment of glyphs in labels with small fonts [#8474](https://github.com/CesiumGS/cesium/issues/8474)
- Converted voxel raymarching to eye coordinates to fix precision issues in large datasets. [#12061](https://github.com/CesiumGS/cesium/issues/12061)
- Fixed flickering artifact in Gaussian splat models caused by incorrect sorting results. [#12662](https://github.com/CesiumGS/cesium/issues/12662)
- Fixed issue where multiple instances of a Gaussian splat tileset would transform tile positions incorrectly and render out of position. [#12795](https://github.com/CesiumGS/cesium/issues/12795)
- Fixed rendering for geometry entities when `requestRenderMode` is enabled. [#12841](https://github.com/CesiumGS/cesium/pull/12841)
- Improved performance and reduced memory usage of `Event` class. [#12896](https://github.com/CesiumGS/cesium/pull/12896)
- Improved performance of clamped labels. [#12905](https://github.com/CesiumGS/cesium/pull/12905)
- Materials loaded from type now respect submaterials present in the referenced material type. [#10566](https://github.com/CesiumGS/cesium/issues/10566)
- Prevent runtime errors for certain forms of invalid PNTS files [#12872](https://github.com/CesiumGS/cesium/issues/12872)
- Revert `createImageBitmap` options update to continue support for older browsers [#12846](https://github.com/CesiumGS/cesium/issues/12846)

## 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 :wr