Here is my arena before I tried to add red IO towers in the distance:

http://www.wwwmwww.com/TRON/walls11a.png

Here is the same scene without the light sources, the arena floor, or the
arena walls, however I've added some cones filled witg red media that look
a little like IO towers.  Note you can still see the edges of the cones but
you have to look for them:

http://www.wwwmwww.com/TRON/walls11b.png

Now here is the exact same scene with this piece of code added:

  light_group {
   light_source {Lights}
    object {GameGrid (520,520,2) translate <2,0,2> rotate 90*y}
    object {Arena}
    global_lights off
  }

Granted this is my first time I've used light groups.

http://www.wwwmwww.com/TRON/walls11c.png

Looks like the game grid and the arena don't even see the lights yet they
still mess up the IO towers in the backgroud.  I have no idea what's going
on here.

Help,
Carl

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