Building my first cage for my first Cham. Decided to make a solid back out of quarter inch plywood to protect the wall from water. Lucky for me my wife has a friend that dabbles in painting pictures. I gave her a few pictures off the internet and told her to do something basic. I already had the board painted the solid green like the rest of my wooden frame for protection. I like what she has done a lot. Will post more pictures of the finished cage when complete. The board is 2 foot by 4 foot.