Przemek Loesch wrote:

> Hi Sam!


Przemek,

I'm sorry my reply is late. I didn't see yours until today :)

<clip>
> and lower right is depth-map
> corrected by making difference with gray, to shift focal point to the
> middle.


Interesting trick.

> My only question to you is about applying blur: Is there any way to apply an
> effect selectively relative to gray map?


Yes, there is.

With my technique, I blurred only the depth map with the Gimp. With POV, 
I used the blurred depth_map as a 'container' for the real image. You 
can blur an image in POV by using the average pattern and a #while loop. 
The blurred pattern is placed in another pigment_map which is inside the 
depth_map.

It's a bit hard for me to explain, so here's a prototype:

#declare depth_map =
pigment{
  image_map{
   tga"depth_map.tga" interpolate 2 once
  }
}

#declare actual_image =
pigment{
  image_map{
   tga"actual_image.tga" interpolate 2 once
  }
}

#declare R = seed(0001);

#declare DOF=
pigment {
  // our 'container'
  pigment_pattern{depth_map}
   pigment_map{
    #local V=0;
    #while(V<=1)
     [V
      // this blurs the image
      average
      pigment_map{
       #local vv=0;
       #while(vv<=V*255)
        [1
         actual_image
         // the 'V/20' at the end of the line below is how
         // we adaptively blur the image according to our
         // depth_map
         translate<rand(R)-rand(R),rand(R)-rand(R),0>*V/20
        ]
        #local vv=vv+1;
       #end
      }
     ]
     #local V=V+1/255;
    #end
   }
  }

I hope this helps.

Good luck~

-Sam

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