I want to be able to group faces/triangles of a collision mesh in one of my models into separate groups. Inside my mod, I want to be able to tell from a trace which group of faces was hit by the trace. The closest thing I can see at doing that is by looking at the "surface" (csurface_t) of the trace. This doesn't give me much information, but from there I can use "surface.surfaceProps" to get to surfacedata_t. From there, I can get to "surfacegameprops_t" which has an interesting variable named "material". I was hoping from that I could get information about the material assigned to the collision mesh's faces. Unfortunately, the entire model yields the same material no matter what texture is assigned to it, and it looks like it's intended for a material defined in Hammer. I'd rather not use hitboxes, but I will if that's the only alternative.
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