What about some of the other fabrics and fabric treatments used in cloth diapering? (diaperpincorner.com)
The seat is made out of durable sponge and has been given the identical mesh fabric treatment to maintain the mesh style of this product. (thatvideogameblog.com)
Maybe make the whole wall one huge fabric treatment, hung higher than the windows and barely touching the frames on each side. (theinspiredroom.net)