Hello.
I have built the lighting in the archvis scene below and I got something satisfactory but when i package the result for windows 64, i get weird shadows around the wall props and light leaks through the bottom of the bathroom.
Is there something i need to do before compiling my project to make sure I get the expected result?
I was lucky to have read your answer before going to bed the other day. wanted to thank since then but the forums were down 
Or just increase your texture memory poolsize. Disabling texture streaming completely could lead up to long loading time when you launch your scene. Depending on it’s size of course.