Added documentation for rendering of points as spheres.
Added documentation for rendering of points as spheres.

code-google-com/cortex-vfx,ruschelp/cortex-vfx,code-google-com/cortex-vfx,ruschelp/cortex-vfx,code-google-com/cortex-vfx,code-google-com/cortex-vfx,ruschelp/cortex-vfx