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<!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'
Preview of image 'radiosity_uvpov2.jpg'
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In article <384ADD44.772AB13A@alpharay.de>, Paul Blaszczyk
<3d### [at] alpharay de> wrote:
[a bunch of unreadable HTML snipped]
Please post in plain text, not HTML. It makes your messages unreadable
by many newsreaders.
Also, don't post images in this group. If you need to post an image,
post it to povray.binaries.images.
You might want to read the welcome message in
povray.announce.frequently-asked-questions titled "Welcome to the
POV-Ray News Server !", it contains information on what each group is
for.
I will have to open your message in Netscape to read it.
--
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/
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Paul Blaszczyk <3d### [at] alpharayde> wrote...
> 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
> at the picture 'radiosity_uvpov.jpg' in the attachement).
> Rendering times for the scene: 0:47 min. UVPOV 6.0
> 4:14 min. UVPOV 6.2
This is a bug with 6.2. I will guess that your walls have surface normals.
If you remove them, this will render much faster and will look normal. I
tried to make UVPov use normals with radiosity in 6.2, and it has a bug.
The next version will fix that bug and by default will ignore the surface
normal for radiosity calculations (much faster).
> 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 picture 'radiosity_uvpov2.jpg'). After restarting
> povray the scene renders normally (but only the first time...).
This may be the result of the same bug. If you have a copy of 6.0 still,
try that. If not, you'll have to wait for the next release and then let me
know if that fixes the problem.
-Nathan
Post a reply to this message
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