The coder has implemented a shader that lets me blend 4 maps using the channels of a mask, but the issue that was really bugging me was blending between two shaders/materials. So, I think the engine would have to be altered to allow for something like that. I tried vertex colors and blending to get that effect, but I think…
I haven't tried out Neil's yet. Does it come with spline painting? I think someone else made a separate script that paints splines, but I only ran across it, shouldn't be too hard to find again but I lost track of it as I never tried it out. AdvPainter works well for what I need it to. Spline painting comes in really handy…