Cesium Version 1.53 Released


We are happy to announce the release of Cesium 1.53.

CesiumJS 1.75

Highlights include:

  • Added image-based lighting for PBR models and 3D Tiles. #7172
    • Scene.specularEnvironmentMaps is a url to a KTX file that contains the specular environment map and convoluted mipmaps for image-based lighting of all PBR models in the scene.
    • Scene.sphericalHarmonicCoefficients is an array of 9 Cartesian3 spherical harmonics coefficients for the diffuse irradiance of all PBR models in the scene.
    • The specularEnvironmentMaps and sphericalHarmonicCoefficients properties of Model and Cesium3DTileset can be used to override the values from the scene for specific models and tilesets.
    • The luminanceAtZenith property of Model and Cesium3DTileset adjusts the luminance of the procedural image-based lighting.
  • Fixed contrast on imagery layers. #7382

For the full list of changes, see the change log.


  • This was another great year helping NORAD track Santa’s journey on Christmas Eve. For details on how it all works (as well as a great overview of Cesium) read Hannah’s blog post, The Tech behind NORAD’s Santa Tracker.


We have a new showcase up on our demos page.

Wasatch Backcountry Skiing MapWasatch Backcountry Skiing Map

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