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in news:3d6521b6$1@news.povray.org Patrick Dugan wrote:
> The
> documentation (6.4.3) indicates the blur should radiate from a focal
> point.
"The center of the zone of sharpness is specified by the focal_point
vector. Objects close to this point are in focus and those farther from
that point are more blurred. The default value is focal_point<0,0,0>."
Is this the part that makes you think that the area of focus is
circular? If so it probably needs to be re-phrased.
>It says nothing about a "plane" of focus or it being linear. I
> think it is a bug in Povray's focal blur.
>
The secene below tries to illustrate that it is a plane of focus, just
like in the real world.
---%<------%<---
#version 3.5;
global_settings {assumed_gamma 1.0}
camera {
location <3.0, 0.0, -3.0>
look_at <0.0, 0.0, 0.0>
right x*image_width/image_height
aperture 20.0
blur_samples 50
focal_point <0,0,0>
confidence 0.99
variance 0.001
}
light_source {<500,500,-500>, rgb 1}
plane {y, -1 pigment { checker}}
sphere {
0.0, 0.5
pigment {rgb 1}
}
---%<------%<---
Ingo
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