Cesium Releases in May 2026
In April, we announced the 2026 Cesium Developer Conference tracks, published the full agenda, and highlighted the pre-conference workshops; excitedly tracked Artemis II; made 3D Gaussian splats available in the Cesium and 3D Tiles ecosystems; and shared what we’re showcasing at GEOINT Symposium next week. Will we see you there? Join us in booth 1303.
We made improvements across Cesium this month. To get notifications about our monthly releases, you can subscribe to the Cesium release roundup thread on our community forum.
CesiumJS 1.141 release
CesiumJS 1.141 is now available. Highlights of the release include:
- Added support for properties (
EXT_structural_metadata) in vector tilesets. #13426 - Bumped minimum required Node version to
22.0.0. BufferPrimitiveCollectionpropertiesmodelMatrix,boundingVolume, andboundingVolumeWCare now readonly. They may be modified, but not reassigned. #13448- Fixed lighting affecting
EquirectangularPanorama. #13369 - Fixed incorrect matrix multiplication for non worldspace instance transforms in
pickModel. #13433
For more details, see the changelog.
A 3D Gaussian splat tileset of the Microsoft campus in Redmond, Washington, USA, in CesiumJS. (Explore the Sandcastle.)
Cesium for Unreal 2.26.0 release
Cesium for Unreal v2.26.0 is now available. Highlights of this release include:
- Added
ACesium3DTileset::UnloadEditorTilesInPlayMode, which toggles whether in-editor tileset instances should unload their tiles before Play-in-Editor begins. This can prevent the Editor from duplicating resources for the same tileset and potentially consuming too much memory. - Added a "Clear Request Cache" Blueprint-callable function to
UCesiumRuntimeSettingsand a button to Project Settings -> Plugins -> Cesium that clears all entries from the SQLite request cache database. - Fixed a bug where Gaussian splats would continually accumulate in the scene, eventually causing the application to crash.
In addition to the above, this release updates cesium-native from v0.59.0 to v0.60.0. See the changelog for a complete list of changes in cesium-native.
Check the Cesium for Unreal release and the Cesium for Unreal Samples release for the full list of updates.
The Microsoft campus in Redmond, Washington, USA, visualized with 3D Gaussian splat tilesets in Cesium for Unreal.
Cesium for Unity 1.23.2 release
Cesium for Unity v1.23.2 is now available.
This release updates cesium-native from v0.59.0 to v0.60.0 and brings bug fixes such as:
- Fixed a bug in
CesiumRasterOverlays::GeoJsonDocumentRasterOverlaywhere styles set on geometry objects within a FeatureCollection were not applied.
See the changelog for a complete list of changes in cesium-native.
Check the Cesium for Unity changelog for the full list of updates, and follow our Cesium for Unity tutorials to get started.
Cesium ion SaaS
- Cesium ion now enables organizations with paid accounts to require the use of SSO when their users log into ion. To learn more, contact support.
- Cesium ion now generates levels of detail (LODs) for Gaussian splat assets generated through the reconstruction pipeline.
Cesium ion Self-Hosted Cesium ion Self-Hosted 1.10.0 is now available.
- Added support for ingestion and streaming of 3TZ assets.
- Added UI enhancements to the Cesium ion dashboard.
- Design tiler: Improved rendering of IFC elements by giving sub-assembly elements the bounding box of the full assembly.
- Design tiler: Added more graceful handling of IFC lines that don’t meet the IFC specification.
- Design tiler: Added support for parsing eastings, northings, and orthogonal height from IFC files.
- Gaussian splats tiler: Added logic to filter out NaN and infinite values when parsing PLY files.
- Design tiler: Emits double-precision floats (instead of single-precision floats) for IFC attributes and properties.
- Design tiler: Fixed generation of IFC swept circular geometry for better shading and performance.
- Design tiler: Fixed issues processing B-splines in IFC files.
- Design tiler: Fixed issues processing some geometries with swept circles.
- Reality tiler: Fixed an issue where duplicate vertices in input models could lead to inefficient textures and larger tilesets than necessary.
- Reality tiler: Fixed a regression where duplicate vertices in the input would be written to tiles, rather than being filtered out.
- Reality tiler: Significantly reduced memory usage for models with spatially incoherent textures.
Asset Server
- Updated the asset server to the latest version.
Design Tiler
- Added
IfcSpacerelations to element properties in IFC metadata.
Reality Tiler
- Fixed a race condition that could lead to subtree files with content/availability bits incorrectly set to zero.
Bedrock.engineer leverages voxel support in draft 3D Tiles 2.0 and CesiumJS to stream large-scale subsurface geoscience data directly in the browser for city planning, infrastructure, and environmental decision-making.
XReality Factory (XRF) uses CesiumJS and Cesium for Unity for a single shared operational view for better, faster decisions across real operations and training scenarios, throughout defense, security, and emergency management.
The Purdue University Envision Center has integrated Cesium for Unity into CollabXR, bringing geospatial support to their XR development platform that allows students and researchers to explore complex datasets together.
Geotour brings together information about Crete’s history, landscapes, and biodiversity as well as photos, panoramas, and video tours of the island in a single interactive map built using CesiumJS.