Cesium Releases in January 2026

In December, the team was in Orlando for I/ITSEC and Exton for our quarterly refactor. Then came all the jolly action with the Cesium-powered NORAD Tracks Santa app.

Today, we opened the call for presentations for the 2026 Cesium Developer Conference. Submit your talk ideas, and we look forward to seeing you in June!

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 1.137 release

CesiumJS 1.137 is now available. Highlights of the release include:

Fixes for positioning in workflows that delete and recreate labels.
Fixes for texture coordinates in large billboard collections.

For more details, see the changelog.

Download CesiumJS 1.137

*CesiumJS rendering a large collection of billboards with high precision, using data from the iTwin Feature Service.*

Cesium for Unreal 2.22.0 release

Cesium for Unreal v2.22.0 is now available. Note that this release removes support for Unreal Engine 5.4; Unreal Engine 5.5 or later is required.

Other highlights of this release include:

Replaced the "Auto Fill" button on UCesiumFeaturesMetadataComponent with "Add Properties". This allows metadata properties and feature ID sets to be selectively added to the component, rather than adding them all in bulk.
Added EnableDoubleSidedCollisions to ACesium3DTileset to allow intersections and collisions with geometry to also work when hitting "back" faces.
Added an optional glTF model post-processing stage after the tile loading step to modify their models before they are displayed.
Added support for refreshing Cesium ion login tokens after they expire and the refresh token is still valid.
Fixed a material generation bug on UCesiumFeaturesMetadataComponent where user-made connections to If nodes were not preserved.
Fixed deprecation warnings when compiling with Unreal Engine 5.5+ by replacing deprecated GetInputsView() calls with FExpressionInputIterator.

This release also updates cesium-native from v0.55.0 to v0.56.0. 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.

Download the Cesium for Unreal plugin from Epic Marketplace Download the Cesium for Unreal Samples

A list of metadata properties available in the New York region of Cesium OSM Buildings, visualized with Cesium for Unreal. — *A list of metadata properties available in the New York region of Cesium OSM Buildings.*

Cesium for Unity 1.21.0 release

Cesium for Unity v1.21.0 is now available. Highlights of this release include:

Added support for refreshing Cesium ion login tokens after they expire and the refresh token is still valid.
Setting CesiumGeoreference.ellipsoid at runtime will now correctly update the Georeference and associated transforms.
Fixed a bug that could cause Cesium3DTileset::Update to be called more than once per frame in the Editor.
Further improved stability when Unity reloads the AppDomain, such as when editing scripts or entering Play mode.

In addition to the above, this release updates cesium-native from v0.55.0 to v0.56.0. 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.

Download the Cesium for Unity samples

Cesium for Omniverse 0.26.0 release

Cesium for Omniverse v0.26.0 is now available. Highlights of this release include:

Fixed loading KTX2 textures with mipmaps.

Peruse the changelog for the full list of updates, and get started with our Cesium for Omniverse tutorials.

Download the Cesium for Omniverse extension Download the Cesium for Omniverse samples

Cesium ion updates

Design Tiler

Reduced memory usage when processing IFC files.
Added support for nested IFC properties.
(experimental) Added support for geospatially locating IFC exports from Archicad.
Fixed a stack-overflow issue when processing some IFC elements on Windows.
If an IFC property has multiple data types, the data will be cast to the most general type.

Reality Tiler