Constant bias scale is really just short form for an add multiply, yes. Think like manually unpacking a normal map. Your source data is from 0-1, black to white, but you need it in the range of -1 to +1. So you need to bias it, and scale it. in this case, you add(bias by) -0.5 then multiply(scale) by 2. graphical example…
Cheers Adam, Are you talking about how the vertex colors are blending between vertices? If you're painting in full color, I don't know that you can get that blend, as its a hardware level lerp, and you're not wanting a linear gradation. If you go back to painting masks you could get an adjustable gradation like that a…