The transition between the archways and the mirror is too obvious, no? There's that dark line. Yes, I would replace the simple glass globe with something yellowish and semi-opaque. The holders, that is, the rods hanging from the ceiling should be replaced. Centrepiece ... I would put a deformed figure. Not a statue. A live figure with the back turned towards the camera. What's on the floor? Water? Cool pillars!

-- erlik