alphaQuad nous illumina en ce 2008-07-18 16:54 -->
> here's one to check out
> 
> adapt Blue Herrin's code like,
> 
> #declare reflector =
> box {
>   <-0.5, -4, -4>, <0, 4, 4>
>   hollow
>   pigment { rgbft <0,1,0,.1,.9> } //White }
>   finish {
>     reflection { 1 }
>   }
>   photons {
>     target
>     reflection on
>     refraction on
>   }
>   rotate z * 45
>   translate x * -9
> }
> object { reflector }
> 
> 
> in place of current reflector, I dont know why I am see what I am seeing.
> 3 beams reflected and transmitted? well I really cant see it yet, very slow.
> 
> render center region with drag, low low res
> 
> next logical step experiment with prism shape , perhaps other shapes
> 
> 
> 
> 
In that situation, it's obvious that you should see multiple beams.

A beam that reflect off the front surface.
A first transmited beam that goes out of the back.
Another that goes into the box, reflect off the back and emerge a little farther.
When it reatch the front face, part of the beam get reflected back into the box.
This gives you the second beam exiting from the back after 2 reflections.
Yet another that reflect trice inside the box.
A forth that have reflected 5 times.
Then a fift after 7 reflections...
Each successive beam become dimer, and, in your case, the forth one is to faint 
to be seen.

If you add "conserve_energy" you'll notice that the extra beans goes away.


-- 
Alain
-------------------------------------------------
Tricks and treachery are the practice of fools, that don't have brains enough to 
be honest.
Benjamin Franklin

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