sheet moss for green patches - reindeer moss and blonde sphagnum moss can also do well and provide a v deserty effect - they’re good for maintaining humidity levels while also leaving the tank dryish - they’re easily revived if completely dried out - for out and out desert enclosures reindeer moss is good because not only does it resemble tumbleweeds but it can help you raise humidity levels at night time like what occurs in the wild - for the sheet moss i usually rip it a bit and really dig it in there and play with it until it looks like naturally occurring “grass” going back and forth between covering some of it with soil, dusting it off, covering, dusting, etc