Volumetric Fog and Lighting in Unreal Engine 4
Volumetric lighting is something I've been using more and more in my projects and slowly, I'm starting to get the hang of it. With each new version of Unreal some interesting updates happen. Unreal Engine recently had a fantastic session at GDC 2018 covering this. Here are the main points. The first thing you'll need to create is a simple Directional Light. This represents the direction of the light from the sun. The Skylight is the indirect lighting that gets caught in the atmosphere. It comes from all directions back into the scene. The Skylight takes a cube map from the skydome image and gives precise richer colors and more light bounces. These can be configured in the World Settings under Num Sky Lighting Bounces. Volumetric lightmaps have replaced the sparse volume lightmap system and now has many more samples and a much larger density. This can be adjusted for larger scenes in the World Settings under Lightmass. Volumetric Lighting Detail Cell Size and Volumetr