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See: http://www.students.tut.fi/~warp/povVFAQ.html#maxtracelevel
Johannes.
Ruben Soto wrote in message <36A### [at] jet es>...
>hope any of you know what did I do wrong.
> I took an object that represents a glass full of whater from the VFAQ,
>and I set up a scene with it. I set the pigment of the CSG object
>representing the crystal glass to have a transparency of .8, and the
>transparency of the cone representing the water to .9. I have this
>problem: When I render this scene, the parts of the water that are in
>rays that only go through 4 surfaces (Both surfaces of the water cone,
>and the in and out surface of the glass), appear with the right
>transparency. However, the parts of the water that are in rays that have
>to cross 6 surfaces (An additional in and out surface of the glass,
>because of the perspective), appear not to be hardly transparent!
> What is the problem here? Is it some setting of POV that I have wrong?
>I have included the POV source below, in case you want to take a look.
>here! ;-)
> Thanks!
>
> Ruben Soto
>
>#include "colors.inc"
>camera {location <0, 8, -5>
> look_at <0, 2, 0>
> }
>
>light_source{
> 0*x
> color red 1.0 green 1.0 blue 1.0
> translate <-5, 2, -10>
>}
>plane {y, 0
> pigment {White}
> finish {ambient .5}
> }
>
>plane {z, 5
> pigment {Red}
> }
>
>// A simple water glass made with a difference:
>#declare MyGlass=
>difference
>{ cone { <0,0,0>,1,<0,5,0>,1.2 }
> cone { <0,.1,0>,.9,<0,5.1,0>,1.1 }
> pigment {rgbt <.4, .7, .9, .8>}
> finish { reflection .1}
>}
>
>#declare MyGlassWithWater=
>union
>{ object { MyGlass }
> intersection
> { cone { <0,.1,0>,.9,<0,5.1,0>,1.1 }
> plane { y,4 }
> scale .999
> pigment { rgbt <.4, .7, 1, .9>}
> finish {ambient .1}
> }
>}
>
>object {MyGlassWithWater}
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