Rendering and picture export of - predefined geometric objects: sphere, cube, torus, cylinder, cone... - user definable 3D functions: f(x, y) = z - user definable parametric surfaces: x(u, v), y(u, v) amd z(u, v) - animations (use a time variable "t" in your functions) Made by the creator of the Android "FreeGeo Mathematics" geometry system.