Hello botanika, well that's a very interesting proposition ! I'm not in a urgent need, so if someday you manage to produce a nice shader like that, let me know ! The ideal would be to be able to drive maps with the four possibilities : black / red / green / blue :) Thanks :) I think Shader Forge's developper is hardly…
There's more than enough shaders available, I would personally recommend the Alloy shader package that comes with a bunch that do this. The team provide great support too. If you want a fiddlier but free tool, you might want to try Lux. Do the vert painting outside or pay a programmer to write you a simple but effective…