// the cornell box
camera {
  location  <0, 0, 3.95>
  up        <0,  1,  0>
  right     <1.3333333, 0,  0>
  look_at   <0, 0, 0>
}


// floor
triangle {
  <1, -1, 1>,
  <1, -1, -1>,
  <-1, -1, -1>
  pigment {color rgb <0.3, 0.3, 0.3>}
  finish {diffuse 0 reflection 1}
}

// left wall
triangle {
  <-1, 1, 1>,
  <-1, -1, 1>,
  <-1, -1, -1>
  pigment {color rgb <0.9, 0.1, 0.1>}
  finish {diffuse 0 reflection 1}
}

// right wall
triangle {
  <1, 1, -1>,
  <1, -1, -1>,
  <1, -1, 1>
  pigment {color rgb <0.1, 0.1, 0.9>}
  finish {diffuse 0 reflection 1}
}

// front wall
triangle {
  <1, -1, 1>,
  <-1, -1, 1>,
  <-1, 1, 1>
  pigment {color rgb <0.3, 0.3, 0.3>}
  finish {diffuse 0 reflection 1}
}

// back wall
triangle {
  <-1, -1, -1>,
  <1, -1, -1>,
  <1, 1, -1>
  pigment {color rgb <0.3, 0.3, 0.3>}
  finish {diffuse 0 reflection 1}
}

// ceiling
triangle {
  <1, 1, -1>,
  <1, 1, 1>,
  <-1, 1, 1>
  pigment {color rgb <0.3, 0.3, 0.3>}
  finish {diffuse 0 reflection 1}
}

// light
triangle {
  <-.25, 0.9, -.25>,
  <.25, 0.9, -.25>,
  <.25, 0.9, .25>
  pigment {color rgb <1, 1, 1>}
  finish {diffuse 100 reflection 0}
}