Looks great.

I liked the beams but they looked a little thin, actually. Maybe thicken them up and add a bit of wood texture to them? They're not necessary, though - especially if you maybe use those tab things to give some more "architectural explanation".

BTW, there's a box outside the front door that seems to have a white border around it that didn't get removed/made transparent. You probably already knew about it but I figured I'd point it out in case it had slipped your notice.

Are you going to create any text explaining things? This yurt, BTW, is perfect for Argria (see my city entry in the CWBP). I was picturing more of a tent-like deal for most of the dwellings but had also wanted a more permanent residence for the folks that had settled in Argria for trade. If you're not doing anything with this after the challenge maybe you'd think about making this part of the CWBP? Just a thought.
M