I tried to model my room with the walls, ceiling, carpet, bed, bedtable, desk and lights.
The texture for the carpet is actually my real carpet. The bedtable and the desk are two-path rendered, 
so that highlights appear on the textures. You can move around in the scene using the arrow keys. 
Page Up/Down lets you look up/down. The 2 lights can be turned on/off with "1" and "2". 

I also tried to implement stencil volume based shadows, which worked a little, but costed me too much
time, so that I had to cut it short. The implementation approach is still in the code though and will
be finished later. Then I also tried to implement a mouse moved camera, so that you can use the mouse
to look around, which I had to cut short as well.