When you make two layers and set the top layer to use Multiply as operator, Paint.net interprets the bottom layer as being 255 in all channels at the transparent (empty, the checkers) areas.
Is there a way to make it interpret an empty area as zero at all channels (black) instead?
I could work around it by just filling the empty areas in a bottom layer with black color. But then you can't really work with the shape (the opaque area), because when you cut something out, you need to refill black again, that's much work to do.
What ways are there to tint a white shape? I tried it with layers, but that's not working nice. And I disagree with paint.net on what it thinks transparent should mean to the multiply-operator, but maybe I'm wrong. What do other programs do in this case?