I had a buddy that made camo nets that looked pretty decent. He washed and dried cheese cloth, and spray painted it green or brown. He would then steal his wifes oregano leaves form the kitchen and put a thin layer of them (covering an area slightly larger than the net) on a piece of paper. He then took a can of 3M Spray Contact Cement and sprayed the cloth. While the cloth was still wet, it was place over the orageno leaves and left to dry. When dry exess leaves were shaken off, net cut to size and rolled or hung as needed. Neat thing was to be there when his wife discovered the oregano leaves were gone and knew the grocery store had just closed.
PS. If you want to get the rubberized look that a lot of canvas has, coat your Kleenex with rubber cement. Let it dry and cover it with talcum powder (takes the stickness out of it). Then paint it the color you want and cut it to size.