The item is not rotated, it's the convention in our engine.xrayjay wrote: Is that item rotated or why there isn´t used a three dimensional Cartesian coordinate system?
the Z in 3dsmax (or blender oe any tool) becomes Y in game, and the -Y becomes Z. (in the top view : the North is heading bottom)
I don't know the exact reason, I think it's because 3D has been extracted from 2D VerticalPlane(screen) :
X= horizontal screen axis, Y=vertical screen axis, then the Z becomes : depth.
Classic 3D tools have XY plane set as horizontal plane, then Z=height