Originally I was thinking I could blend materials on my terrain mesh (not landscape; just plain static mesh) to have tire tracks, foot prints, etc. However that didn’t work out because blending via vertex color works for tiling textures, generally.
Now I am thinking that it would be nice to have a way to simply add stuff like tracks, foot prints, oil spill puddles, etc. over the terrain and have them to be “projected” onto the terrain mesh surface either during cooking stage or real-time. Something like additive material, so that the “decals” conform to the surface (but also with normal map and having these “decals” to be affected by lightmaps and/or dynamic lighting).
Maybe there is a better way of doing this?
Can someone please help with the material setup (or another way of doing such “decaling”) ?