Lol "talented coder". Takes a lot of talent to put an invisible ladder and platform into a tree. There is a reason that guy is banned on this forum: for devs he is annoying as fuck. He comes in here and posts videos of what is "possible" on the BF2 engine and the slack jawed yokels eat it up. Then they ask why it isn't in. Nevermind that he often outright cheats or doesn't mention that lots of this coding stuff doesn't work online at all.
As an example:
https://www.youtube.com/watch?v=qz44Q_sCsi4Amazing, right? We always thought this was impossible! Hire this man! Well, notice how he drives only on a completely flat surface and in a straight line? Well that is because the flak is just a part of the truck, much like our aa trucks in fact. Just this one looks fucking stupid if you drive a curve or up a hill.
So no, he is not a "talented coder", he is a talented hoaxer who preys on the incompetent to appear amazing. He probably jacks off to you mentioning him as we speak.
About the tree thing: Sure it is possible, but it is a stupid idea of the kind bored public players come up with. There is no way to implement this without it being either inconsistent (why is only one tree climbable and the others aren't) or a totally superfluous gimmick that advocates camping even more than is already the case. Also, imagine trying to take cover behind a tree and starting to climb it instead. There is a difference between coding something into a mod because you can and actually designing it to have a point. There is lots of stuff we could do that we don't because there would be no point on it. This, by the way, is the difference between an actual modder and a random script kiddy like Devilman.
Which makes it all the more frustrating to see people fawn over his inconsequential play-things.