exact point on a rotating sphere I have a sphere that represents the Earth textured with real pictures. It's rotating around the x axis, and when user click down it has to show me the exact place he clicked on. For example if he clicked on Singapore the system should be able to understand that user clicked on the sphere (OK, I'll do it with unProject) understand where user clicked on the sphere (ray sphere collision?) and take into account the rotation transform sphere coordinate to some coordinate system good for some web api service ask to api (OK, this is the simpler thing for me ) some advice?