@ Steempipe
Thanks your code!

I wrote very basic lite-c MDL7 SKIN# effects system. It's play sequence textures (ex: fire_4x4.png = 16 frame pictures) on effect model, support TexturePacker and XML data. But the FPS is very low in my game (testing 10+ entity), this is a big problem. But in UNITY easily use shader editor support sequence textures, mesh vertex alpha, uv moving, texture scale, RGB color blend etc.

I'm shader noob, but I hope some like shader can be achieved in 3DGS.
(need your help free or non free support)

Thanks again!