Flying is one thing - swimming, climbing and spider-climbing
Well ... we probably dont get Swimming, since so far the only water we have found worked as natural borderline ...
But if (and yes im aware that would be big if) vertical scale (aka axis Z) would be implemented ...
Wich WOULD be needed for flying ...
I see no reason why shouldnt we get climbing. O_o
Now feel free to corect me if im misstaken ...
(
In idea ... this was purely constructed by Google Translator, bcs im not good enough in English to start theoretizing about pracitcal uses of Pythagorean theorem 
So if any sentence dont make any sence, or use inapropriate words ... Blame google!)
But the only difference between a character who can fly and what he can climb ...
The thing is, if we imagine the starting destiny of both as point A ... the destination as point B (assuming we climb up) ... and then we draw a perpendicular to the ground passing through point B ... thus creating a right triangle ABC.
So the difference is that while the flying character crosses the distance after the veil ... the crawling character must follow him through the squares.
So the flying character travels: A> B
A crawling charcter travels A> C> B
And if he has a crawling character spider-climbing, he can stop during the climb ... and if he doesn't, then he can't.
So in both cases we need the engine to understand the movement in the 3D environment to calculate the movement distance.
Well, since he would still need the two remaining dimensions to calculate the distance of the perpendicular ... wouldn't it be a shame not to use them?
