I got a problem that drives me mad:
If I use the mia_architectural shader (mia_material or mia_material_x) and specify some render channels like Diffuse, Reflection, etc, the alpha in the render channels is totally black except in the Main render channel. So the render channels appear empty in the compositing program.
If I use a Phong or Lambert everything works as expected. So something seems to be different with mia_material.
So is there a special option I have to activate/deactivate when using the mia_material or a special way to set up framebuffers?
Thanks for any help!.