I've been struggling with dark ceilings in my interior renderings.
Firstly I tried upping the lumens on my light fittings, I couldn't understand why the image got darker and darker they higher I went, but I've since read that this is due to proportions of contrast, and indeed, once I returned the lumens to an appropriate level, my ceiling brightened up slightly yet still remains unrealistically dark. I'm not able to lower them yet further as the interior as a whole becomes too dark.
I then tried attributing my ceiling with a light source material, but this is far too extreme and becomes divoid of shadows.
Finally I tried using an invisible light, set in the middle of the room, but this doesn't look realistic.
I'm trying to show a client how, with a few clever design ideas, his basement office needn't be dark and dingy - so far my images merely confirm the validity of his concerns.
Does anyone have any suggestions that might be of help?
Incidentally, I see that this issue was also raised in a forum comment on 6th Jan, so I'm sure any suggestions will be gratefully received by others too.