So I create a new solid, draw a mask on it, and apply 3d stroke to the layer as well. However, nothing happens with the mask. I can increase the thickness, etc and nothing shows up.
I have the correct path selected within the 3d stroke effect (Mask 1, which is the name of the mask I created). If I do the same thing with after effect's built-in stroke command it works fine, but not with 3d stroke.
I have also tried adding the 3d stroke prior to adding the mask, but that hasn't helped either.