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Arnold - stacked materials and alpha?


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Hey there, I'm fairly new to ARNOLD for C4D, and I'm wanting to stack 2 textures, and have the top one have some transparency (a mouth that will swap textures so it animates).


When I add the mouth overtop, its alpha actually cuts through both textures and makes that part of the geometry disappear. Is there a way to prevent this? I may actually end up building this differently, but I'm wondering if there's a fix.


The alpha for the mouth texture is a separate B&W image and is hooked up to Geometry > Cutout Opacity. I've added the C4DtoA tag to the geo and turned off Opaque. Thx very much!

Arnold alpha setup.jpg

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