Weird Light-Blocks when walking through the leve

Hi there,

i have a big Problem.

If i walk through my Level, small light-blocks appears on the borders of some walls and props. It doesn’t matter where they are. For example, if i set a pillar from the Floor to the Roof and walk to it, i can see in most cases a light block on the borders. The same for the walls on the edges.

I tried to use one sided Polygons, two sided Polygons (closed) and nothing works. I set the shadow to production and tweaked the light Building (like the shooter demo). Nothing.

I wanted to make a Video (screenshot), but if i record the Video with fraps, the light-blocks are not there. So i can’t Show you a Screen.

Does any one know what the Problem is? I get the idea, that eventually the normal maps are a Problem. Maybe they don’t fit on the wall edges. But my materials are made with substance designer and quixel suit. So this should not be the Problem.

I hope someone can help me.