ok, I found the "spots" problem - it was connected with bulbs. It works now. Thanks

attached. still learning so it's far from perfect..

Can you see my test render which I attached? I'm sorry but I'm new here and don't know how everything works.
I did what you said and the result is not impressive, maybe I'm making some mistake..

hey Thomthom,
thanks for your response. I tried to do it this way. I still have 2 problems, firstly I can see some spots all over the picture and secondly I left the hole in the surface to imitate the window but I cannot see the effect ot the "window" inside the bathroom.

Hi
I have a problem. I'm trying to do a bathroom render - the space is quite small, so my scene view is from outside the room. I did it by making wall layers invisble. The problem is that when I do so, the light is coming to the interior like the wall is not there.
I would like to see light from exterior which is coming thru the window in the wall. I tried to play with hiding the wall but it doesn't work either.
Does anyone have an idea how to make it properly?
Will be much appreciated.