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1.135

CesiumGS/cesium1.135Nov 3, 2025by jjspace

AI Summary

CesiumJS 1.135 is a major release with breaking changes to Gaussian splatting support, experimental 3D Tiles terrain functionality, and new glTF extension support.

Key Highlights

  • Removed support for KHR_spz_gaussian_splats_compression extension
  • Added experimental support for loading 3D Tiles as terrain via Cesium3DTilesTerrainProvider
  • Added support for EXT_mesh_primitive_edge_visibility glTF extension
  • Improved performance of scene.drillPick, removing primitives, and terrain Quadtree handling

Breaking Changes

  • Removed support for KHR_spz_gaussian_splats_compression - requires re-tiling existing Gaussian splatting 3D Tiles

New Features

  • Experimental 3D Tiles as terrain (Cesium3DTilesTerrainProvider)
  • EXT_mesh_primitive_edge_visibility glTF extension support

Full Release Notes

1.135 - 2025-11-03

Highlights include:

- 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)
- 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)
- Improved performance of `scene.drillPick` ([#12916](https://github.com/CesiumGS/cesium/pull/12916)), removing primitives ([#3018](https://github.com/CesiumGS/cesium/pull/3018)) and terrain Quadtree handling of custom data ([#12907](https://github.com/CesiumGS/cesium/pull/12907))

See the [changelog](https://github.com/CesiumGS/cesium/blob/1.135/CHANGES.md) for the complete list of changes.