On Wed, 24 Mar 2004 20:47:54 -0600, How Camp <kro### [at] hotmailcom>
wrote:

>Perfect!

I spoke too soon.  My understanding from reading the docs (6.5.8, as
Bob pointed out) is that a light_group can be formed with a
light_source and another object, and the indicated light_source will
only affect the object(s) in the light_group.

...So, what am I doing wrong in the following scene?  Somehow, my
light in the light_group is affecting the two text objects outside the
group.

Incidentally, this effect seems to disappear if I comment out the
'looks_like {LightBox}' line in the scene.



camera {
 location <0,0,-5>
 look_at <0,0,0>
}

#declare LightBox=
box {
   <-1,-5,-1>,<1,5,1> 
   texture {
      pigment {rgb 1} 
      finish {ambient 1} 
   }
   scale <0.25,5,0.1> 
   rotate -45*z
}

//light_source {<-10,5,-10>,1}

#declare MainTex = 
texture {
   pigment {
      color rgb <1,0.9,0.3>
   }
   finish {
      ambient 0.1 diffuse 0.2
      specular 0.5 roughness 0.001
      metallic brilliance 2
      reflection {
         <1,0.9,0.3>,0.5
         metallic
      }
   }
}

light_group {

   light_source {
      -10*z,<1,0,0>
      looks_like {LightBox}
      rotate <0,(45-90*0.5),0>
   }

   text {
      ttf "times.ttf"
      "Flashy Text", 0.25, 0
      texture {MainTex}
      scale 0.5 translate <-1.25,-0.125,-0.125>
   }
   global_lights
}

text {
   ttf "times.ttf"
   "Top Text Above", 0.25, 0
   texture {MainTex}
   scale 0.5 translate <-1.25,0.625,-0.125>
}

text {
   ttf "times.ttf"
   "Bottom Text Below", 0.25, 0
   texture {MainTex}
   scale 0.5 translate <-1.25,-0.725,-0.125>
}




- How

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