Reticulated pythons are semi arboreal and more arboreal than a lot of other semi arboreal snakes.
I have also stated that MOST snakes in captivity are over fed.
I'm glad to see that some folks that actually visit the natural habitat of the species concur with what I have found out through my own research.
https://www.youtube.com/watch?v=OSIfov45U5o
80% of the time my retic is perched.
If I had the space I would provide an even larger setup for this guy.
Retics are supposed to be lean and active.
I actually don't recommend them as pets for the most part. The SD version is a good option but once you get into the larger sizes you have provide for them.
The video link has great info and DM Exotics has the same or slightly different version of this on the TUBE as well.
Give the retics some ceiling!!