Thanks guys

Chicky: So far no, just relying on the good old brightness area changes.
m0ds: The bag and cog icon were actually a test for the Android (touch screen and all that), although I may bring them back in, I'm in 2 minds about it.
Anian: The artefacts on the walls are indeed caused by the rendering, especially when a lot of varying lights are used. I personally don't mind it though - it seems to give it a certain quality although if people think they're distracting I'll fix them up.