Hi!
Thank you, yes the assets are all made by me; I am in my dissertation module of my Master’s degree in Environment Art for video game, and this problem has completely thrown me as I’ve never had this kind of lighting issue before.
I just tried what you suggested and put a UE default cube in the scene and baked with lightmap resolution on the cube of 512, and the result is below, its the same, I don’t think it’s my meshes…
Yes i have a light mass importance volume. When the issue started I even deleted it and put in a brand new one just in case there was something wrong there but the issue persists 