> If someone figures out a way to pass in animation time to a sampler, sample along geometry/wireframe or something else, and keep it from overly twinkling it might change everything.

Not sure that's what you mean, but there was recently a paper where they put meshless (e.g. voxel or SDF) geometry in an animated tetrahedral mesh "cage" and then animate the meshless model by animating the mesh cage:

https://diglib.eg.org/server/api/core/bitstreams/bd94e19b-98...

https://youtube.com/watch?v=6lKAvxV2mno

https://youtube.com/watch?v=3c3-ue-fd88

Though this currently isn't compatible with 3DGS if I understand the limitations section correctly.

> Finally, our method operates unordered, limiting its suitability for complex volumetric effects. However, a potential solution lies in sorting the generated intervals for proper blending. This enhancement could improve our approach’s compatibility with various meshless representations, such as radiance fields and volumetric lighting.