Thread by @HighlySpammable

Volumetric Fog in @UnrealEngine isn't limited to just one generic density slider. You can actually apply the properties to a material and use objects or particles to set up little artistic fog regions! It's a great way to quickly add a bit of character to an area. #UETips

Here's the #UE4 material! I'm using the radius of the sphere for one mask and I'm also using the Distance To Nearest Surface to keep the fog clinging to actors in the scene. The Volume Texture is just Voronoi noise from the built in Volumetrics Plugin.

You'll still need the ExponentialHeightFog actor in your scene with Volumetric Fog enabled. Even if the density is 0! To use DistanceToNearestSurface you'll need Distance Fields enabled in the Project Settings. If you want the fog to still be visible in the dark add some emissive

If you want to tweak the effect on a per-actor basis without having to juggle instances or unnecessary simple blueprints you can use CustomPrimitiveData to tell the variables to read values straight from the mesh!