I'm trying to make parts of a t-shirt invisible by applying a transmap. As you can see in the picture, I have cut away the arms and parts of the chest. The weird thing is that those parts does not become 100% transparent. You can still see them. It's most obvious at the arm and neck trim (those are separate material groups on the shirt), but you can also see how the color of the t-shirt is still slightly visible against her skin. In a larger image than this one, you can clearly see the outlines if the t-shirt against the background too. Any idea why this happens and how to solve it? The black color on the transparency map representing the cut-away parts are truly black (RGB = 0,0,0), so that is not the problem.