Attmepting lumiosity masks...I select and save the blue channel as new channel. Put a curve on the alpha 1 channel. Back to layers, create a black mask, reselect alpha 1, start painting using brush. It is my understanding that the brush should be contained to the area that is selected ( illustrated by marching ants) but the brush will paint anywhere.
Colour is white. Mode is normal.
Can't seem to find this issue in a forum anywhere or figure out the solution. Please help. THanks!
Is your Alpha channel solid black and white? Keep in mind that the selection (marching ants) only shows the area that is more than 50% selected. Thus, areas that are gray on the mask are actually part of the selection even though they do not show up inside the selection.