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Here's a simple scene setup, using PP blur :
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#version unofficial MegaPov 0.6;
#include "colors.inc"
camera {location <100,0,0> direction z*1 look_at <0,0,0>}
plane {y,-50 pigment {checker color SteelBlue
color YellowGreen scale 20}}
plane {z,-10
pigment {gradient x
color_map {[0 White][.5 White][.5 Red][1 Red]}
scale 20
}
}
global_settings {
post_process {
focal_blur{30, 0, 5, .5}
}
}
light_source {<400,500,300> White*2}
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The blur start is at 30 units, and the depth is 0. By reading the
docs, I would assume that nothing would be in focus, but everything
in the front is in focus. I went to think that blur only worked
behind the start point, well..
But if I change the depth to 1 unit, the result is very different,
much more different that I would expect from a little 1 unit difference.
This may sound incoherent or strange, but the thing is : I don't
understand anything anymore about that focal blur effect !!
So, could someone give me an explanation of what I am seeing, and
explain (with a sample scene, at best) how it actually works ?
(or how to relate what's written in the docs to the visible result !)
Fabien.
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