I took another look at this, It appears that 3dsMax gives the boundary vertices of the boolean operation a vertex color of [0,0,0,0]…strange. I couldn’t figure out a workflow in-editor to prevent this, so I was able to add some additional logic to avoid zeroing out the mesh vertex color when this happens.
Hello
It didn’t help, but I converted to patch, then to NURBS, and it almost worked!
Now somehow I need to return the original texture (I don’t know what NURBS is)