Do you have an example as to how you’d go about doing this?
I tried a few combinations with an overlay node but no matter what the grey is always affecting the base albedo undesirably. I ended up subtracting 0.3 from the mask to bottom out the greys, and then applied a power node to help brighten the whites without turning it into a pure black and white. Then I saturated it and multiplied against a noise mask to break it up before adding it to the albedo.
