Rendering ambient occlusion shader shadows as transparent

[Anonymous]

I'm new to Arnold, is it possible to render ambient occlusion shader shadows as transparent (only black shadow parts without white opaque objects)? I've been looking into shadow matte, but to no avail.

[Anonymous · Accepted solution]

Probably something like this.

This gives a shadow on a transparent background.

[Anonymous]

Great! Didn't really understand how to use mix shader to accomplish this. It does exactly what I wanted, thanks a lot for your help!