What effect does scaling a camera have on focal_blur?

I have two cameras, and they should both produce the same result. But 
they don't.



// focal blur camera
camera {
   location  <0,0,-5>
   look_at   <0,0,0>
   right     x*image_width/image_height
   up y
   aperture 1.0           // [0...N] larger is narrower depth of field 
(blurrier)
   blur_samples 10        // number of rays per pixel for sampling
   focal_point <0,0,0>    // point that is in focus <X,Y,Z>
   confidence 0.95        // [0...<1] when to move on while sampling 
(smaller is less accurate)
   variance 1/200         // [0...1] how precise to calculate (smaller 
is more accurate)
   scale 2
}

/*
// focal blur camera
camera {
   location  <0,0,-10>
   look_at   <0,0,0>
   right     x*image_width/image_height
   up y
   aperture 1.0           // [0...N] larger is narrower depth of field 
(blurrier)
   blur_samples 10        // number of rays per pixel for sampling
   focal_point <0,0,0>    // point that is in focus <X,Y,Z>
   confidence 0.95        // [0...<1] when to move on while sampling 
(smaller is less accurate)
   variance 1/200         // [0...1] how precise to calculate (smaller 
is more accurate)
}
*/

Post a reply to this message