Adding LODs to glTF

We have been experimenting with the idea of adding LODs to glTF through this extension:
https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/MSFT_lod

These could be useful for rendering optimizations where you can render a different LOD based on distance of object and also provide a progressive loading experience by incrementally loading and rendering the lowest to highest LODs

Some wip demos:
https://sbtron.github.io/BabylonJS-glTFLoader/?model=BoomBoxLOD
- load another asset first to get the environment cached
- turn on throttling to see the progressive load of textures

Would love any feedback?

Start by reading the linked MSFT_lod extension and reviewing the BabylonJS glTFLoader demos to understand the proposed LOD and progressive-loading behavior. The issue asks for feedback on the approach but does not identify a code change, implementation entry point, tests, or acceptance criteria, so a concrete definition of done is still needed.

Written by the indexing model from the issue text.