> to enable accurate detailing, as i watch it, the car seems to from
> start do , a right turn, a left turn, a second left turn and then ends
> with space/ displacement in the loop

Yes... its just a 4 second animation looped.  This is still very much
a work in progress.  There is a higher quality one posted here:

http://www.tron-sector.com/forums/default.aspx?do=top&id=274417

along with some more info.

> just prior to the right turn, the tail effect seems to fragment
> after the first left, i see a triangular shaped shadow, which i
> undersand, on the second left turn there appears  a darker
> red triangle which i dont follow, unless you have another
> light source that causes it

Yes... there are a total of 4 light sources in this scene.

light_source {<4000,6000,-6000> White}
light_source {<-60000,30000,10000> 0.5*White}
light_source {<-5000,9000,-6000> 0.7*White}
light_source {<-60000,70000,-15000> 0.3*White}

In the link above I talk about game grid units.
1 game grid unit = 100 POV-Ray units.

The grid itself is this:

  #declare Foo = function
{min(abs(x)-int(abs(x)),abs(z)-int(abs(z)),1-(abs(x)-int(abs(x))),1-(abs(z)-
int(abs(z))))}

  #declare grid = plane {y, 0
    pigment {
      function { Foo(x, y, z) }
      color_map {
        [0 color White]
        [0.01 color White]
        [0.02 rgb <0, 0.05, 0>]
        [0.98 rgb <0,0.05, 0>]
        [0.99 color White]
        [1 color White]
      }
    scale 500
    }
    normal { bumps 0.01 scale 30 }
    finish {
      ambient .1
      diffuse .5
      reflection .55
      specular 1
      phong 1
    }
  }

> anyway i could leave it running in lieu of a screen saver, been
> watching for 10mins do :-)

Thanks... I can do better.  I'm still trying to add the lines to the
tail.  Check out what I tried to do over in the newusers area and
let me know if you have any ideas.

> wish i knew more

Did I answer all your questions?
Carl

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