POV-Ray: Newsgroups: povray.binaries.images: HCR-Edit focal blur example #2 (78k)

POV-Ray : Newsgroups : povray.binaries.images : HCR-Edit focal blur example #2 (78k)		Server Time 15 Aug 2024 12:23:54 EDT (-0400)

From: Christoph Hormann
Subject: HCR-Edit focal blur example #2 (78k)
Date: 30 Jun 2002 12:17:03
Message: <3D1F2EFC.6AF5A365@gmx.de>

I implemented variable blur radius and improved speed by precalculating
spline values.  

This picture uses a maximum radius of 15.

Christoph

-- 
POV-Ray tutorials, IsoWood include,                 
TransSkin and more: http://www.tu-bs.de/~y0013390/  
Last updated 30 Jun. 2002 _____./\/^>_*_<^\/\.______

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Download 'hcr_focalblur2.jpg' (78 KB)

Preview of image 'hcr_focalblur2.jpg'

From: Samuel Benge
Subject: Re: HCR-Edit focal blur example #2 (78k)
Date: 30 Jun 2002 13:58:44
Message: <3D1F46CF.90302@caltel.com>

That looks better, Christoph. For some reason it still has a little bit 
of a soft feel near the intermediate parts of the blur effect. It seems 
to diminish the realism present in pov's focal blur.

Do you feed HCR-Edit a grayscale map with a gradient laying along the 
z-axis of the scene for it to get the focusing right?

Christoph Hormann wrote:

> I implemented variable blur radius and improved speed by precalculating
> spline values.  
> 
> This picture uses a maximum radius of 15.
> 
> Christoph
> 
> 
> 
> ------------------------------------------------------------------------
> 

-- 
Samuel Benge

sbe### [at] caltelcom

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From: Christoph Hormann
Subject: Re: HCR-Edit focal blur example #2 (78k)
Date: 1 Jul 2002 03:09:21
Message: <3D200020.E627F619@gmx.de>

Samuel Benge wrote:
> 
> That looks better, Christoph. 

Thanks.

> For some reason it still has a little bit
> of a soft feel near the intermediate parts of the blur effect. It seems
> to diminish the realism present in pov's focal blur.

I don't quite understand.  See attached image with internal focal blur for
comparison.

> 
> Do you feed HCR-Edit a grayscale map with a gradient laying along the
> z-axis of the scene for it to get the focusing right?
> 

I used

      pigment { 
        function { min(1, f_r(x, y, z)) }
        color_map {
          [0 rgb 0][1 rgb 1]
        }   
        scale 36      
        translate Cam_Location
      } 

which is of course not really correct, but it does hardly make a
difference in this case.

Christoph

-- 
POV-Ray tutorials, IsoWood include,                 
TransSkin and more: http://www.tu-bs.de/~y0013390/  
Last updated 30 Jun. 2002 _____./\/^>_*_<^\/\.______

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Download 'hcr_focalblur3.jpg' (80 KB)

Preview of image 'hcr_focalblur3.jpg'

From: marabou
Subject: Re: HCR-Edit focal blur example #2 (78k)
Date: 1 Jul 2002 04:41:00
Message: <3d20159c@news.povray.org>

some objects are floating into each other, because all have the same color. 
IMHO, if you see all shapes it would look a bit better.
have you ever tried to nuances of white?

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