I did a quick check, here is what I found (opened /Common/Rooms/Room_CT.gr2):
1. Enabled 3 lights (directional, point, spotlight) of different colours, all work.
2. Switched to 'Rendering' tab, unchecked 'Specular - Enabled', nothing changed, checked it back, suddenly all goes flooded with white light (the picture is there but it is all in like a light-white fog), appears that it is checked wrongly at the start(?).
3. Switched to programmable shaders, all went black.
Disabled/enabled the lights, tried many other things, still all black.
4. I am not sure how to check the bumpmap, but I see bumps in fixed shaders. Sorry for being silly. Can do other checks if you tell me what to do.