I'm trying to render layers suitable for output to photoshop for matte painting. I've made an example scene to illustrate the problem I'm having. The meshes composite correctly in blenders compositor, but when layered in photoshop the occluded parts are black instead of empty so they don't layer properly. How can I render layers so that they'll composite properly in photoshop? In the image below I have the layers across the top, and on the bottom left the compositor output as desired, and on the right the layers composited in photoshop. the goundplane, cube and sphere are rendered to separate layers as shown in the compositor and output through a File Output node as RGBA .png files.