Replicating the World Ambient Occlusion setting on a per-shader basis

Support Materials and Textures
3

I think you’re right. Just tested this myself with a simple Suzanne scene. World Ambient Occlusion with factor 0.1 seems to be roughly equivalent to the following setup:

Screenshot%20from%202019-11-04%2021-08-17
Screenshot%20from%202019-11-04%2021-08-171426×813 175 KB

Some thoughts:

  1. I figured out the 0.08 value in the Multiply node through experimentation. Looks like there’s no simpler way to determine that value straight from the World Ambient Occlusion factor :frowning:

  2. In my experience, adding emission to a material can cause fireflies in cavities, whereas the extra brightness from World Ambient Occlusion seems to be immune to fireflies. That makes me wonder to what extent Ambient Occlusion node + Emission node is affected by fireflies… Unfortunately, this problem is hard to reproduce with simple test scenes.