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I am using Blender Cycles to render the following 2 layers:

layer 1

layer 2

However, I would like the overlapping parts in image 2 (see arrows) to be transparent, not black. I have already searched for many things here (alpha over, mask layer, etc), but I still don't know what I need to do exactly in order to make those black parts transparent.

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If your two layers are House and Grass:

enter image description here

House will look like this:

enter image description here

This says that all the objects in the scene are on layers 1 and 2, the house is on layer 1, and it should be covered up by layer 2 (the grass).

Grass will look like this:

enter image description here

This says that all the objects in the scene are on layers 1 and 2, and the grass is on layer 2.

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  • $\begingroup$ @GlimpseIdea Glad I could help! Please accept the answer if it solved the problem :-). $\endgroup$ – Scott Milner Sep 20 '17 at 2:07

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