I love tent dresses. This is a classic sleeveless. If you had better fabric, you could probably make it better. I also used a million layers because all the fabrics I used were see through. You could cut the layers down to 1 if you wanted to. They look best with a belt. I put a belt on it because tent dresses have been know to "make even the skinniest of girls look pregnant", according to my
Fashion 101 book.
I tried to draw you some pictures, but it didn't really work. Basically, I used a sheer tablecloth and some silk-like material. I folded the green silk in half and the fold went on the bottom of the tablecloth. You cut the tablecloth to about 3 inches over the desired length before you layer the two on top of each other and sew down the middle. My tablecloth already had a loop in it, so I didn't sew that part when I went down, and just put a few stitches at the top of it. Thread some elastic and secure it, and you've got it.
Please ignore the clutter in the corner of the big picture. It's glue gun stuff from me trying something that didn't quite work. :P