You want to create a forest edge in your enclosure. You want lots of branches and vines to provide lots of little chameleon roads to travel on, patrol his enclosure (an adult male thing) and exercise. I like real branches. Avoid ones from trees with heavy odors or saps, like pines, eucalyptus. Oak is great. Wash with some soapy water, rinse extremely well and air or sun dry. No need to bake, bleach or otherwise sterilize. I even leave lichen on mine. Then your plants should be dense enough to provide areas to hide in, take shade from the heat/uvb, collect water droplets for drinking and just exploring.
It can be a challenge to hang things, especially with screen. One awesome solution is Dragon Ledges.
https://dragonstrand.com/dragon-ledges/ Some have crafted their own, but I don’t recall how. When I needed to set up an enclosure and there was no time to wait for Dragon Ledges, I used some scrap garden trellis. I secured it with thin wire to the frame of the enclosure. I did add a couple of screws on each support so they wouldn’t slide down. It’s much sturdier than I thought and looks better than I expected, so it’s what I’ve been doing with additional set ups. I can attach lots of branches and even some potted plants.
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