POV-Ray : Newsgroups : povray.unofficial.patches : Radiosity bug in UVPOV 6.0/6.2 : Radiosity bug in UVPOV 6.0/6.2 Server Time
2 Sep 2024 16:15:19 EDT (-0400)
  Radiosity bug in UVPOV 6.0/6.2  
From: Paul Blaszczyk
Date: 5 Dec 1999 16:46:52
Message: <384ADD44.772AB13A@alpharay.de>
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
Hello,
<p>i've rendered an old scene with UVPOV 6.2, and it takes much longer
as with 6.0.
<br>The second thing was, .that the scene looked strange (see at the picture
'radiosity_uvpov.jpg' in the attachement).
<p>Rendering times for the scene:    0:47 min. UVPOV 6.0
<br>                                                
4:14 min. UVPOV 6.2
<br>Settings used:
<br>      ini_option "+QR"
<br>      ini_option "Preview_Start_Size=16"
<br>      ini_option "Preview_End_Size=8"
<br>         radiosity {
<br>          
brightness      
2.5
<br>           
count           
150
<br>           
max_sample 1
<br>           
distance_maximum 0.0
<br>           
error_bound      0.4
<br>           
gray_threshold   0.1
<br>           
low_error_factor 0.4
<br>           
minimum_reuse    0.01
<br>           
nearest_count    10
<br>           
recursion_limit  1
<br>        }
<br>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).
<br>As light i've used the standard light_source and also the spectrum-light
(only one light in scene).
<p>The second bug:
<br>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 picture 'radiosity_uvpov2.jpg'). After restarting povray the scene
renders normally (but only the first time...).
<p>  Bye
<br>    Paul Blaszczyk
<br> 
<p>Homepages:    <A
HREF="http://www.alpharay.de">http://www.alpharay.de</A>       
<A HREF="http://www.povstudio.de">http://www.povstudio.de</A></html>


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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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