As I mentioned, during the design process I have tried out various color combinations to make it more life like. I would like to bring some of them into discussion and hope to learn from this and also give you an idea of such a design process.
First of all, everything was planned black and white:
Then I tried out colours which allows me to include a pattern into the floor, and it looks very believable:
At some point I wanted to brighten up the scene towards the corner:
Here i was already moving back to less colours. My final decision (black-white) came up, as I think its best if everything outside the spotlight is mostly black. So it has a surprise effect.