Need help adjusting a color mask
Hi all -- new to illustrator so I have a question regarding color masks (and masks in general). What I'm looking to have is a difference mask that only shows up over the layers and not on the white background. For example:

I have a rectangle with a blending property of "difference." What I want is for just this mask to just be visible over the two people, warping to their shape and potentially a few others. I've tried looking up tutorials but am at a loss, so any information would be greatly appreciated.


Clicking the "make mask" button just makes the color disappear. I'm not quite sure how to use that option.
