Merge Path Subtraction 3D Problem

Question

Pardon the newbie question, but I'm learning bezier editing on a shape layer in After effects and I have two groups that behave completely differently when 3D is switched on for the group. If you see the "A" and the "R" in this graphic, you see that in 2D space, (2nd image below) the hole in each letter is removed in subtract mode, but when I switch on 3D, the "A" hollows out and makes the hole solid. I've set up each group the same way, and each of the primary shape paths look the same. The "A" renders as a solid when the hole is removed. Any hints?

foxetown · Accepted Answer

Another illustration of the problem letter not subtracting the interior shape next to a random double set of shapes. On the right, the random shape is properly removing the interior shape in 3D. On the left, I pulled down a vertice and it stopped performing the subtraction.

This isn't a solve, but a less-than-ideal work around. The only difference between these two groups of shape layers is that the inner "A" on the right has one vertice dragged slightly lower and to the right. When you have 3D checked on and play with a vertice, the rendering goes solid or hollow for some reason I can't determine. If you're patient, you can get close to the shape you want. This feels like a bug to me in the Cinema 4D rendering engine. Apparently, I can't attach the AE file, for your review, but if it helps anyone else, this is the only way I could find to address the problem.

foxetown · Answer

Not sure if this means anything, but the problem letters appear to have difficulty responding to stroke widths in 2d. (Not sure if that says something about the path itself.)

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