Okay, I lined up the spheres perpendicular to the light and now see what you 
mean. I should have done that before.
  About the boxes, I removed the same-surface effect by scaling one of them 
slightly larger in the z direction.
  No merge problem so it appears. Except...

// blackout in box edges and in sphere overlap (check it out)

global_settings {max_trace_level 30 } //set high doesn't help

camera{location<5,15,-25>look_at y*5} //shifted camera over -10*x from before

light_source{<0, 50,-730> rgb 3} //same here, intense light

//Incorrect behavior: (corrected?)
merge{
box{<-5, 5,-1.01>,<5, 7,1.01> //z dimension increased
// pigment{rgbf<0,0,1,1>}
//  interior{ior 1.9}
//   finish{ambient .95}
}
box{<-1,-5,-1>,<1,10,1>}
 pigment{rgbf<1,0,0,1>}
  interior{ior 1.9}
   finish{ambient .95}
// }
}

//Correct behavior: (?what's with the blackout?)
merge{
sphere{<-10,10,0>,5
 pigment{rgbf<1,0,0,1>}
  interior{ior 1.9}
   finish{ambient .95}
}
sphere{<-7.5,10,0>,5
 pigment{rgbf<0,0,1,1>}
  interior{ior 1.09} //ior turned down to see blue at all
   finish{ambient .95}
 }
}

plane{-z,-50 pigment{rgb 1}}

background { color red 1 green 1 blue 1 } //no help either

//END

I tried increasing color intensities above 1 with no change too. I would have 
expected to see magenta. Any ideas?
  Oh yeah, Barnum&Baileys was recently in town, but I didn't see which way the 
train went ;)

Message <366BD04E.8B806AD0@pacbell.net>, Ken  typed...
>
>=Bob wrote:
>
>> Back to the merge thing...
>> I didn't look at it too well first time. Then I realized the textures were
>> added differently for the pair of boxes and pair of spheres. The boxes have 
a
>> shared texture in the merge statement. The spheres have independent 
textures.
>> The spheres also have a shadow showing the supposedly merged surface area
>> which should be gone, and it is labeled as "correct".
>
>The different pigments do nothing to the behavior. I checked.The demarkation 
lin
>e
>you are seeing is due to the different
>pigments and not due to internal surfaces. Otherwise they
>would follow the shape of the sphere as opposed to being
>a straight line.
>
>> The boxes labeled
>> "incorrect" have no shadow of the merged surfaces even when they are 
changed
>> to have non-coincident surfaces by scaling the z of one slightly larger.
>
>> Plus the anti-merge (or whatever) effect is gone this way too.
>
>You lost me on this one. Care to rephrase the observation ?
>
>> So, now what?
>
>Which way to the circus ?
>
>Ken Tyler
>

-- 
 omniVERSE: beyond the universe
  http://members.aol.com/inversez/POVring.html
=Bob

Post a reply to this message