Light functions can add a lot of visual power to your work without a lot of cost. Now with the new Light Function Atlas in 5.5 it’s even better! I’m excited to share how to bring color to your light functions, check their efficiencies, and show moving light functions through fog and water! Jump in and learn how to bring more light FUNctions to your levels!
https://dev.epicgames.com/community/learning/tutorials/Bdvy/unreal-engine-light-function-atlas-5-5-next-level-power-efficiency