That's what I do. When I get the needed effect, I have to copy merged alpha and paste it to the new layer, because I can't have too many layers. I never use the wet brush, because I can get a better (and more predictable) effect with the regular brush with different blending. Same for dodge and burn brushes - they are too harsh, even at 1% opacity. I use "screen" and "multiply" brushes. Not sure I understand the difficulty of picking a color from the active layer pixel vs. from the "visible" one. Is this because of the wet brush by default already factors the underlying pixels? Anyway, thank you for adding this. Let's see if the new wet brush would be more useful.