Volumetric Video

[expenses]

I want to look into implementing the XRFoundation's volumetric video codec for Mateversum: https://github.com/XRFoundation/Universal-Volumetric The have demo files here: https://github.com/XRFoundation/UniversalVolumetric-Demo

Parsing the json manifest and loading the geometry into buffers seems easy enough. The harder part is handling the video texture. I made some rough changes to wgpu to allow for external textures a while ago, so I'd need to dig those out.