I think it is a paintjob, i can see some paintbrush marks in some of the details.....the guy probably has a very steady hand and donnie probably had less of that, and more blending/mixing of colors to have a fuller detailed look. Then again, you dont see too many closeups of real donnies.
Noone has been able to pull off the same kind of detail, or technique in his painting that donnie hunt had, most of the replicas I've seen don't really come close to it.
The best rainforest replica I've seen is the one that Mr. Fede did.
The snake is way too pricey, and it doesnt even have a floating bridge.