"clipka" <nomail@nomail> wrote:
> "Mike" <win### [at] hotmailcom> wrote:
> > Also, I notice that sometimes when the max trace level gets blown out I get
> > either a white or black spot.  I would prefer black, can I choose; what does
> > the difference correspond to?
>
> I have been told that you can control this with the background color. Never
> tested it myself though.

I just tried it:
_________________________________________________________

global_settings
{  assumed_gamma 1
   max_trace_level 5
}

background { rgb <0, 1, 1> } //bright cyan background ;-)

camera
{  location <-3, 2.5, -10>
   look_at <-0.3, 1.2, 0>
   angle 22
}

light_source { <-1, 3, -2> * 10000, rgb 1 }

plane { y, 0 pigment { rgb 1 } }

union
{  #declare I = 0;
   #while (I < 5)
      box { <-1, 0, I>, <1, 2, I + 0.5> }
      #declare I = I + 1;
   #end
   pigment { rgbf <1, 0.8, 0.6, 1> }
}
_________________________________________________________

It doesn't seem to work that way, at least not with my version (the backwards
vintage 2006 3.6.1c.icl8.win32).

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