MAX TRACE LEVEL is the key!

Cheap explanation:
Pov returns a black color for every ray that DOES NOT hit some solid object
after it bounces around max_trace_level number of times (eg 5 times) and
THAT is why the ball is opaque. Jaime Vives Piqueres has a file called
"glasswater.pov" on the "Persistance of Ignorance" site www.ignorancia.org
and that helped me immensely.

It's default is 5
Set it to something insanely high like 64 and you'll be laughing!

Check it out:

#version 3.6;
global_settings{assumed_gamma 1.8 max_trace_level 64}

#include "colors.inc"
#include "textures.inc"
#include "glass.inc"
#include "metals.inc"
#include "golds.inc"
#include "stones.inc"
#include "woods.inc"
#include "shapes.inc"
#include "shapes2.inc"
#include "functions.inc"
#include "math.inc"
#include "transforms.inc"

#declare r=10;
#declare rot=<50,-10,0>;
camera
{
 angle 40
 location<0,0,-r>
 rotate rot
 look_at<0,1.8,0>
 right (image_width/image_height)*x
}

//light_source{<15,25,-25> rgb 1 area_light 3*x 3*z 4 4}
light_source{<15,25,-25> rgb 1}

plane
{
 y 0
 pigment
 {
  //rgb 1
  checker rgb 1 rgb 0
 }
}

#declare tex=texture{pigment{rgb<1,0,0>}finish{specular 0.8 roughness 0.07
reflection 0.3}}


merge
{
 difference
 {
  cone{<0,0,0>0.8<0,1,0>0.3}
  cone{<0,-0.01,0>0.7<0,1.01,0>0.2}
 }
 torus{0.75 0.05 clipped_by{plane{y 0}}}

 lathe
 {
  cubic_spline
  5 <1.0,-0.3> <0.3,0><0.2,0.8><0.3,1.5> <0.5,2>
  translate<0,1,0>
 }

 merge
 {
  difference
  {
   sphere{0 1}
   sphere{0 0.9}
   plane{-y 0}
  }
  torus{0.95 0.05}
  difference
  {
   sphere{0 0.9001}
   plane{-y,0.25}
   material{texture{pigment{rgbf<1,0.6,0,0.9>}finish{ambient 3 reflection
0.2}}interior{ior 1.3}}
  }
  scale<1,1.6,1>
  translate<0,4,0>
 }


 //texture{tex}
 material
 {
  texture{pigment{rgbf<1,1,1,0.9>}finish{specular 1 roughness 0.03}}
  interior{ior 1.5}
 }
 translate<0,0.05,0>
}

Just cut and paste and THEN make sense of it.

Captain

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