opacity driven by occlusion.

[Robert]

I'm trying to reproduce a trick I use in Redshift and Cycles. I use the occlusion texture to drive the transparency/opacity of a material. So the object get transparent everywhere it collide with a mesh. Its used for image planes with transparency.
However I can get that to work. I use the dirt shader texture to get the occlusion, but each time it get connected to a different material input other then diffuse it shows no result. Any hint on how that might work?

[Robert]

It works however with a blend shader and one shader set to opacity zero.