Lee Griggs covers creating god-ray like space warp effect using an atmosphere volume with Arnold.

Volume rendering in Arnold is a versatile workflow for a lot of different effects. While you can have a volume fog, this new tutorial from Arnold rendering specialist Lee Griggs shows how to use an atmosphere volume in Arnold to create a space warp effect.

The tutorial shows a simple method that includes a point light, a volume, and a UV projection to create a colorful crepuscular effect.