Hi, here is a demo of something that I wanted to find/make for a long time. It was impossible without the new Raycast node in the latest 5.1 beta.
Gradients down from overhangs and top edges of every feature. Simply a mask for dirt dripping down walls.
I know the math is not the most elegant but it works, well only with Cycles for now.
I added more fluff in the file but it’s really just the first nodegroups.
Feedback welcomed. Cheers!
drip_mask_03.blend (457.1 KB)