// Persistence of Vision Ray Tracer Scene Description File
// File: ?.pov
// Vers: 3.6
// Desc: Image Map Example
// Date: mm/dd/yy
// Auth: ?
//

#version 3.6;

#include "colors.inc"

global_settings {
  assumed_gamma 1.0
}

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

camera {
  location  <0.0, 0.0, -4.0>
  direction 2*z
  right     x*image_width/image_height
  look_at   <0.0, 0.0,  0.0>
}

sky_sphere {
  pigment {
    gradient y
    color_map {
      [0.0 color blue 0.6]
      [1.0 color rgb 1]
    }
  }
}

light_source {
  <0, 0, 0>            // light's position (translated below)
  color rgb <1, 1, 1>  // light's color
  translate <-30, 30, -30>
}

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

plane {
  y, -1
  texture {
    pigment { checker color rgb 1 color blue 1 scale 0.5 }
    finish { reflection 0.2 }
  }
}

plane {
  z, -1
  texture {
    pigment {
      image_map {
        png "test.png" 
     // file_gamma 1.8 // new in 3.7 

        interpolate 2 // smooth it
        once   // don't tile image, just one copy
        filter 0 0.8  // make 1st color mostly transparent
        filter 1 0.8  // make 2nd color mostly transparent
      }
      // transform it to unit-size (-1 to +1)
      translate -0.5*(x+y) // center on the origin
      scale 2              // make it unit-sized
    }
    finish { ambient 0.3 }
  }
}