How to add quick archtectural details

Hey. What are you using to light the scene? When I tried to use it in my scenes earlier I came up with a problem. It was bearly visible while using static skylight. It only worked for me with dynamic direct light. I found this solution Decals not rendered without direct lighting? - Rendering - Unreal Engine Forums but it still didn’t work out for me.
Dose anyone have the idea how to solve this problem??