Hi! help me please in expanding cylinder to surface. I mean, I have cylinder: Code (Text): x = 3Cos(u) y = v z = 3Sin(u) u=[0;2Pi] v=[0;2] I guess now I need to find some functions instead of Code (Text): 3Cos(u), v, 3Sin(u) that will a point on surface (not 3d space), something like this. PS: the example of my task is a globe transformed to a surface as map. Appreciate your help, Alexandr.