Cesium ion Reconstruction Pipeline No Longer Requires Mesh Generation for Gaussian Splat Workflows
Michael Rubloff
Cesium just concluded their annual developer conference and their June 2026 release removes the requirement that reconstruction jobs in Cesium ion include mesh generation, allowing users to run point cloud or gaussian splat pipelines through the platform's reconstruction workflow.
Previously, submitting photos for 3D reconstruction through Cesium ion produced a mesh as part of the process whether or not a mesh was needed. Mesh generation added processing time and complexity to jobs where only splat output was required. The June update makes the pipeline output types independent, so a user who uploads source imagery and wants only a Gaussian splat 3D Tileset can route the job accordingly.
In April 2026, Cesium introduced hierarchical LOD for Gaussian splats, enabling large splat datasets to be streamed with level of detail management using 3D Tiles as the spatial index and glTF as the payload format via KHR_gaussian_splatting, which reached release candidate status at Khronos in February 2026.
The same June release includes CesiumJS 1.142, which adds rendering support for 3D vector tiles generated through the Cesium ion vector tiles technology preview, and ships Cesium Copilot, an in-app AI coding assistant for Sandcastle.
Cesium for Unreal 2.27.0 includes vector tiles raster overlay support and a crash fix in UCesiumGaussianSplatSubsystem. Cesium also announced that the legacy Model tiler will be retired from Cesium ion on September 1, 2026, in favor of newer tilers that output 3D Tiles 1.1.
