For reference: glTF Extension KHR_gaussian_splatting for 3DGS scene representation

Is your feature request related to a problem? Please describe.

OGC 3D Tiles is a great spec for tiling massive meshes, pointclouds or large instance arrays. Some great people eg from Cesium and jdultra are starting to extend the glTF spec to allow for the representation of a gaussian splat scene. This then allows for the tiling and streaming of a gaussian-splat tiled scene.

I'm opening this discussion thread here in case you'd like to keep track of the current state of things outside the 3DTilesRendererJS repo. Feel free to close it and watch the universal splat thread instead, since this 3DGS feature seems out-of-scope for this library at the moment.

Describe the solution you'd like

Here https://github.com/mkkellogg/GaussianSplats3D/issues/47 is a mega discussion regarding a universal gaussian-splat format, with a lot of great takes and mentions - mostly regarding compression, like Niantic SPZ, and standardization.
A recent comment by lilleyse (Cesium team member) redirects to the draft KHR_gaussian_splatting glTF extension as well as an implementation within CesiumJS in the experimental splat-shader branch

Describe alternatives you've considered

CesiumJS viewer will probably be the first reference implementation for that KHR_gaussian_splatting extension + OGC-3D-tiles

No repository file, test, entry point, or concrete acceptance criterion is named. Start by reading the referenced KHR_gaussian_splatting draft and CesiumJS splat-shader branch, then confirm whether this project intends to support the extension; the issue currently defines no implementation or completion criteria.