Wyatt,
Chameleons are arboreal, meaning they are tree-dwelling creatures. I would focus more on the top and mid portion of the cage by adding horizontal branches and plenty of foilage, so he is able to hide from the light when needed. I'd recommend getting one of those bird ladders and placing it horizontally across, about 8 inches down from the top of the cage. You can then use it as a base to hang the fake vines and fake plants.