I believe you have to take the .obj into a 3D package to do this – the points you refer to are the vertices which describe the object. If you reduce them to any extent, you’re not going to have sphere anymore, you’re going to have a blocky looking spherical shape, which won’t really look like a sphere any more (very faceted). What are you trying to achieve?
Joe Bourke
Owner/Creative Director
Bourke Media
http://www.bourkemedia.com