3d-tiles-renderer/src/three/plugins/fade/TilesFadePlugin.d.ts

https://github.com/AnalyticalGraphicsInc/3d-tiles/tree/master/specification

export class TilesFadePlugin {

	constructor( options?: {
		maximumFadeOutTiles?: number,
		fadeRootTiles?: boolean,
		fadeDuration?: number,
	} );

}