POV-Ray : Newsgroups : povray.unofficial.patches : Radiosity bug in UVPOV 6.0/6.2 (text-version) : Radiosity bug in UVPOV 6.0/6.2 (text-version) Server Time
2 Sep 2024 16:18:31 EDT (-0400)
  Radiosity bug in UVPOV 6.0/6.2 (text-version)  
From: Paul Blaszczyk
Date: 5 Dec 1999 17:36:19
Message: <384AE8E1.2D31259D@alpharay.de>
Hello,

i've rendered an old scene with UVPOV 6.2, and it takes much longer as
with 6.0.
The second thing was, .that the scene looked strange (see:
http://www.povstudio.de/radiosity_uvpov.jpg ).

Rendering times for the scene:    0:47 min. UVPOV 6.0
                                                 4:14 min. UVPOV 6.2
Settings used:
      ini_option "+QR"
      ini_option "Preview_Start_Size=16"
      ini_option "Preview_End_Size=8"
         radiosity {
           brightness       2.5
            count            150
            max_sample 1
            distance_maximum 0.0
            error_bound      0.4
            gray_threshold   0.1
            low_error_factor 0.4
            minimum_reuse    0.01
            nearest_count    10
            recursion_limit  1
        }
I've also rendered the scene with various values for count (100 up 650),
error_bound (0.1 to 1.0) and low_error_factor (0.1 to 1.0).
As light i've used the standard light_source and also the spectrum-light
(only one light in scene).

The second bug:
After restart of the rendering, the right wall becomes holes. I have
tried a heigher value for max_intersections (like 128), but with no
effect (see:   http://www.povstudio.de/radiosity_uvpov2.jpg). After
restarting povray the scene renders normally (but only the first
time...).

  Bye
    Paul Blaszczyk


Homepages:    http://www.alpharay.de        http://www.povstudio.de


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Attachments:
Download 'radiosity_uvpov.jpg' (12 KB) Download 'radiosity_uvpov2.jpg' (7 KB)

Preview of image 'radiosity_uvpov.jpg'
radiosity_uvpov.jpg

Preview of image 'radiosity_uvpov2.jpg'
radiosity_uvpov2.jpg


 

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