hplus0603 said:
@convert What does “game model format” mean?
Modern geometry formats support arbitrary numbers of vertex attribute channels. Modern engines support binding arbitrary vertex attribute channels to arbitrary material properties. You can easily wire this up in the Unreal Engine material editor, and import the data from a FBX or USD or similar rich data format.
I think I've even seen models on the Unreal Marketplace which use one set of vertex colors for actual color/tinting, and another set of vertex colors for distress map blend – Unreal supports “vertex color paint,” where you can make the red channel blend in grime, the blue channel blend in wetness, and so on. It will then store the vertex channel data you modified separately from the imported asset data, and merge them at build time.
FBX for example is model format. Not sure which exactly format Unreal Engine uses, but does it really suport multiple number of vertex color sets?
