Lol It really isnt about models or hitbox's same is the speed boost
They didnt change how the enviroment is smoothed, and it isnt hard for them lol
the enviroments are actually made in a shitty low poly form and then smoothed
http://photos1.blogger.com/blogger/8...alidar_WDL.jpg
The way wallwalking worked was your character would come in contact with the edge or a vertice on the enviroment and you would be able to follow that along a wall.
blizzards response to that was fixing the
movement of the character, as well as the way your characters physics interacted with the enviroment's model so you could no longer walk on walls, thus wall jumping was found, jumping onto a vertice or edge of the enviroment and your character "sticking" to it,
They nerfed this by fixing the physics of the enviroment and your characters movement in the sense of jumping
it may be possible that with an increased speed that you move farther and at a smoother angle
so instead of going 2 feet up and 10 feet away it stretches it out and its makes it longer if you can understand that, making it so you can stick to a vertice or edge possibly more easy
but correct me if im wrong, cant you still walljump while your not dead, and its really really hard. might have to do with your characters hitbox but i mean thinking about the game engine and rednering engine that wouldnt make much sense.