Well as a matter of fact I built one. ...my own design.
FYI, I will give permission to anyone on this site that asks me- assuming not for commercial use. i have applied for a patent...not to be a jerk...just to retain some control over this. Heck ,i will even send the pattern piece if I haven't seen you make any rude posts here- grin.
My design has venting in the side wall skirting under the outside edge of the perimeter. The perimeter forms an eve to keep the window form getting soaked. The wall is a lime green[ hard to see in pics] with window vents sewn in. Sure a guy can lift the perimeter to get the same effect. This keeps the bugs, mosquitos and varmints out....and the big advantage is it maxes out the usable space of the design [my big complaint with my old SL5]
I can tell you it works pretty slick in avg locations but does not eliminate condensation entirely in very wet spots. When camped on fairly dry ground in MT- 3 of us and very little to zero condensation. In alaska over mushy tundra that we had to make a grid of alders and brush to stay out of the muck...there was some condensation. Heck when raining we had water running under our grid so you won't find wetter than that. The skirt gives you more space to stay away from the lower walls it so it wasn't a problem.
first pitch without the sides
in alaska Edit; what looks like green meadow there in front of my good buddy Tim is actually about 12" deep water with grass sticking out of it. ....oh the spots we let these pilots dump us when there are big moose nearby!
In montana
its 12 sided to take advantage of fabric size though its more sewing, about 12' 6" from inside wall to inside wall, and from 8' to 8'10" tall. Fabric is the 1.6oz hyper d from Ripstop BTR, tent itself weighs 5.5#, with stakes, cords and pole all in right at 9.5#...rolls to the the size of a syn sleeping bag. We had verified 50 mph winds and it sheds wind like a champ if you keep it tensioned right...in the MT pic it shrunk a little.