POV-Ray Geometric Shapes

Disk_X

// --------------------------
object{
 Disk_X // no open available!
 scale <1,1,1>
 texture{
  pigment{color rgb<.8,.5,1>}
  normal {bumps .5 scale .025}
  finish {phong 1 }
  } // end of texture
  rotate<0,0,0>
  translate<0,0,0>
} // end of disc -----------

Disk_Y

// --------------------------
object{
 Disk_Y
 scale <1,1,1>
 texture{
  pigment{color rgb<.8,.5,1>}
  normal {bumps .5 scale .025}
  finish {phong 1 }
  } // end of texture
  rotate<0,0,0>
  translate<0,0,0>
} // end of disc -----------

Disk_Z

// --------------------------
object{
 Disk_Z
 scale <1,1,1>
 texture{
  pigment{color rgb<.8,.5,1>}
  normal {bumps .5 scale .025}
  finish {phong 1 }
  } // end of texture
  rotate<0,0,0>
  translate<0,0,0>
} // end of disc -----------

Notes:
All these "Disks" are declared with a size of one unit.
Changes in size must be done by scale.