I have read that spotlights are slow and heavy, so their use should be limited to where absolutely necessary. This is according to "Mobile 3D Graphics: with OpenGL ES and M3G" by Morgan Kaufmann. So I wonder if it is possible to make a fast M3G animation with spotlights? I want to change the direction and the colors of the spotlights. It should look something like this:

http://www.mobile-visuals.com/gfx/el11.gif