In New England, a place called "The Fabric Place" carries raw muslin with widths up to 102"... I have made 4 using these and 6-10 boxes of your favorite color Rit Dye. Get some really large rubber bands and loosely wrap sections in the upper middle and then Dye them. If you wrap to tight, your going to get a "tye-dye" look but when doing it loosely, you get nice textures. My first one I used 6 boxes of black Rit dye and it came out a great almost neutral grey. I bought the 102"x 25' and have a great full length muslin. The next one I bought, same size, and left it the way it came for a great high key back ground. Another one is dyed brown (use 10-15 boxes to get a rich brown) and the other is splattered randomly with different colors of paint. As I recall, I paid around $65.00/ muslin that size.