specifics?
Blocky:
The little red signs (i.e. that " < A >") would probably look better with a print or ramps used cleverly somehow.
The interior could use some rounding off aside from the parking area
The rubble at the defender spawn is rather tall; IMO plates would work better.
And the interior details, like the stacks of grey cubes. I'm not even sure what those are, so I don't know if I can say they're blocky or not. :s
Colors:
The section with the blue-painted grey brick wall is one thing, the blue is a little brighter and the grey too blueish. This is probably just the colorset though, dunno.
That gigantic red wall could use a darker tone.
That one light stone grey is seriously overused in the exterior area.
I hope that didn't sound too offensive. :c
unless its a perfectly clear day out and there are no shadows at all then snow is never that eye blinding, it looks ugly and sucks
Look at the map's sky and check for shadows.
Yeah, exactly.