Today I built a canvas. (No its not the one in the photo, that's just a demonstration) I will never look at a canvas the same way again. First, before today, was a very long trip to home depot and an art supply store and over $300 spent. Today in class I had my two pieces of 1x2x42 and two pieces of 1x2x54 and four 3''4'' half rounds cut to match the four pieces of wood. Once in class we glue down the three quarter inch half rounds with the edge facing out along the side of the plywood. Then you have to take 1'' nails and nail the 3''4'' round to the plywood. Have you ever had to nail on a rounded edge? So thirty nails or so later you have all four pieces of wood with the attached 3''4'' inch round (around which you will stretch your canvas so it doesn't stick to the plywood). Then you put some goggles on and go to the saw and cut two 45 degree angles in each piece of wood (making sure that each side matches its opposite)....