Hey, that's really nice. My only crit is the light right at the back up the stairs. Perhaps make it more easy to see? Maybe stronger? Right now the main light is the washed out sun.
This is what i'm working on, but as you can see something is horribly wrong on the right. I think. (The window on the right is the UV3d Window in silo. PM me if you can halp? I'm so lost. with everything.)