Refraction Tut! Heat Distortion and Such in Blender (Patreon)

I'd avoided working with refraction for so long because I thought it was computationally prohibitive, but it's not at all, and it's crazy useful! This is a deeper dive than usual into path tracers and shading nodes and all that. Thanks as usual to Nathan Vegdahl, who's willingness to share his path tracing wisdom has given me a much better understanding of how computers go about rendering light.

Tier 3 Steam Elements:
https://www.patreon.com/posts/tutorial-working-37050460

Tier 7 Steam Elements:
https://www.patreon.com/posts/asset-steam-37054986