In the first image, the tile allows for enemies to round the corner and hit the industry generator without being able to be targeted by the turret right beside it. The second image shows which room/tile causes this. 

In the third image, a minor module slot is inside the wall a bit. I don't actually know if this interferes with gameplay, as I didn't get an opportunity to build a turret in there, but it may obscure it's vision if the first image's situation is anything to go off of or possibly make the turret impossible to reach by enemies