@Joey: What do you mean with setup? I am kind of a shader noob but it looks like a whole shader. I think he wants to know how to integrate this shader into 3DGS.
Greets Rackscha
MY Website with news of my projects: (for example my current Muliplayer Bomberman, GenesisPrecompiler for LiteC and TileMaster, an easy to use Tile editor) Sparetime-Development