Enterable Buildings and light bleeding

Hi there, for a while now I have been trying to put a simple building into my game project. I have tried multiple ways of doing this but always run into lighting issues. I tried separating the pieces of the house because I thought it may help some but I still get a light bleeding issue. I modeled the house as one piece and still, light bleeding. I cant quite figure out how to set up my lighting in order to avoid this light issue and I am pretty sure it’s not down to my UV maps. I have a separate lightmap with no overlapping UV’s on any. So I guess my question is, how can I avoid these light bleeding issues? I have tried turning on 2 sided shadows but to no avail. Any better ideas? I can supply screenshots if you require them to better understand my issues.

That’s a common issue and there are plenty of information about this on Answers hub and forums.

Here is where to start:

HTH.