Hi,
I wonder if I need to change my PC. It is a Pentium II notebook,
with 256MB memory runing NT4 at ??unknown MHz??

It took me about 20 hours to render the following code.
Any one to check with a more recent machine?

#include "colors.inc"
#include "metals.inc"
#include "functions.inc"

light_source
{
  <10, 10, 10>
  color rgb 1.0
}

light_source
{
  <-5, -5, -10>
  color rgb 1.0
}


camera
{
  location  <0.0 , 5.0 ,-7.0>
  look_at   <0.0 , 0.0 , 0.0>
  right     x*image_width/image_height
}


//        function(x,y,z) { -(sin(5*sqrt(x*x + z*z)+0.00001))/(5*sqrt(x*x +
z*z)+0.00001) + y } // onde
//        function {
f_spiral(sin(3*atan2(z,x)),y,-3+sqrt(x^2+z^2),0.3,0.1,3,1,1,1.5) }        //
disque avec 6 spirales

isosurface {
        function {
f_spiral(sin(3*atan2(z,x)),-3+sqrt(x^2+z^2+y^2),y,0.3,0.1,3,1,1,1.5) }
// alternative declared function
        contained_by { sphere { 0, 3.2 } }  // container shape
        //threshold 0.0                     // optional threshold value for
isosurface [0.0]
        accuracy 0.001                      // accuracy of calculation
[0.001]
        max_gradient 11                      // maximum gradient the
function can have [1.1]
        //evaluate 1, 1.2, 0.99             // evaluate the maximum gradient
        //max_trace 1                       // maybe increase for use in CSG
[1]
        texture {
                bozo
                texture_map {
                        [0     T_Gold_3C]
                        [0.25  T_Gold_3E]
                        [0.5   T_Chrome_3E]
                        [0.75  T_Chrome_3E]
                        [1     T_Gold_3C]
                }
        }
}

with this ini file:

[1024x768, AA 0.3]
Width=1024
Height=768
Antialias=On
Antialias_Threshold=0.3

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