Tone mapping

Tonemapping

The purpose of the Tone Mapping function is to map the wide range of high dynamic range (HDR) colors into low dynamic range (LDR) that a display can output.

More Info About Filmic Tone Mapping:

https://docs.unrealengine.com/5.1/en-US/color-grading-and-the-filmic-tonemapper-in-unreal-engine/