lmcolor and lighting a surface with a scalar field

[Thant Tessman]

In article <10856 at odin.corp.sgi.com>, kurt at cashew.asd.sgi.com (Kurt
Akeley) writes:

> No need to reverse the order of the vertices when drawing the back-facing
> polygons.  Just call backface(FALSE) and frontface(TRUE).  Then redraw.

Cool!  I didn't know about 'frontface'.

thant