Not really homemade, but an easy mod...
I cut the corners off of the 9x9 Gear Guide camo tarp at the side seams, sewed some tie-outs at the corners, and made myself a camo hex tarp.
I'm still looking at using the leftover triangles somehow. I hemmed them and sewed tie-outs to the corners of them as well. I'll have to experiment further.
I put these pics in the gallery too.