I searched the web to figure out my issue but couldn't find the right answer anywhere.
I feel like it should be a very simple solution.
I am drawing animations with the brush tool onto a black solid layer which is set to add blending mode.
My goal is to create a mask on the solid layer to hide a certain area of what I drew... but it doesn't change anything.
I noticed when I add another effect to the layer (such as curves) the mask does hide that area of the effect, but thats not exactly what I'm trying to do.
Thanks in advance for anyone who can give me a tip
ps. I have After Effects CS6
You can't mask directly on a paint layer but you can use a black solid set to screen, draw the mask on the black solid and use that as a track matte for your paint layer or you can pre-compose the paint layer and mask the pre-comp. It's a render order thing.