MISSIVE STILL LOOKING FLAT AFTER NODE FIXES? TRY THIS PROJECT SETTING IN UE5.5! You’ve tweaked your material graph, cranked the intensity, added bloom… but your emissive colors still look washed out, grayish, or just wrong. The problem might not be in your material — it’s in your Project Settings!
https://dev.epicgames.com/community/learning/tutorials/5E2X/unreal-engine-epic-for-indies-how-to-fix-flat-emissive-color-in-project-settings-in-unrealengine-5