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1.144

CesiumGS/cesium1.144Aug 4, 2026by jjhembd

AI Summary

CesiumJS 1.144 introduces support for Bentley materials, enhanced vector rendering on terrain, new camera controllers, and significant memory optimizations for 3D models.

Key Highlights

  • Adds support for the BENTLEY_materials_planar_fill glTF extension to improve CAD-style rendering with depth sorting and coplanar ordering.
  • Enables vector polylines and polygons to be clamped to terrain with screen-space-constant width lines and per-feature styling.
  • Introduces new camera controllers and a more extensible controller architecture for better asset inspection.
  • Optimizes memory usage for models using the EXT_mesh_primitive_edge_visibility extension, reducing JavaScript heap by up to 19x.

New Features

  • BENTLEY_materials_planar_fill glTF extension support
  • Vector rendering clamping to terrain
  • WMTS imagery provider metadata picking on draped 3D Tiles
  • New camera controllers

Full Release Notes

1.144 - 2026-08-03

Highlights include:

- To improve CAD-style rendering, CesiumJS adds support for the Bentley-contributed BENTLEY_materials_planar_fill glTF extension, bringing planar polygon fill with depth sorting and coplanar ordering that keep overlapping surfaces from flickering. [#13178](https://github.com/CesiumGS/cesium/pull/13178)
- Vector rendering now supports clamping vector polylines and polygons to terrain with screen-space-constant width lines and per-feature styling through Cesium3DTileStyle. This allows massive, tiled visualization of datasets like road connectivity, rivers, and census blocks that correctly overlay on top of terrain. [#13627](https://github.com/CesiumGS/cesium/pull/13627)
- Picking of metadata from WMTS imagery providers now works when the imagery layer is draped on 3D Tiles. [#13575](https://github.com/CesiumGS/cesium/pull/13575) 
- New camera controllers, and a more extensible controller architecture, allow controls to be better targeted to asset inspection and other use cases. [#13604](https://github.com/CesiumGS/cesium/pull/13604)
- Models using the EXT_mesh_primitive_edge_visibility extension now load with significantly less JavaScript heap (up to 19x less memory). [#13643](https://github.com/CesiumGS/cesium/pull/13643)

See the [changelog](https://github.com/CesiumGS/cesium/blob/1.144/CHANGES.md) for the complete list of changes.