I just picked up a small, crappy tent that I think will be just right for me and my minimal gear this year, with the bonus that it has very little mesh to seal. I'm thinking of shading it with the rainfly of another tent that's staying at home. The fly is considerably larger, so there would be between half a foot and 1.5 feet between the fly and the tent on all sides. I know that space between shade cloth and shaded area is critical.
I've seen some people suggest tent-inside-a-tent to reduce dust, but my aim here is keeping the temperature bearable for an hour or two longer in the morning. The problem is that rainfly material is not breathable; will using a rainfly at a distance keep things cool or will it just make a sauna of the space between it and the small tent?
I thought about rolling up the rainfly a foot or two around the bottom to let air through, but I'm already having to jury-rig the fly's support skeleton so I worry about losing guy line attachment points.
My back-up plan is just a tarp with four poles like was posted in the backpacking tent shade thread.
It makes sense if you don't think about it.