I am still very new to unreal engine. I have encountered an issue where lighting will leek through walls and through the floor. I have tried to put another box in front of the lighting and it does not fix the issue. I have been searching through forums for quite a while and tried all of the possible solutions. None of them will work. Including changing all the brushes to a double sided mesh. I am not sure if I am building correctly or if I am doing something wrong.