/*
 
 RPI-transforms.pov
 
 Shows how to use the RPI_PTransform macro.
 
*/

#version 3.7;

// ------------------------------------------------

#include "RPI.inc"

plane{z,0
 
 pigment{
  RPI(
   pigment{
    RPI_PTransform(
     pigment{
      boxed
      warp{planar}
     },
     1/8,         // rotation (twisting)
     1.0,         // scaling
     1.0          // fading
    )
    
    // corrective rotation
    rotate z*360/16
    
    // scaling over 1.0 will produce some artifacts
    scale 1.333
   }
  )
  scale 1/2
 }
 
 finish{ ambient 1 }
 
}

// ------------------------------------------------

global_settings{
 assumed_gamma 1.0
}

camera{
 orthographic
 location -z*10
 look_at 0
}