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I've been generating some movies of moving human heads for my Psychology
research.
Some examples are:
http://cognitrn.psych.indiana.edu/busey/forZyg/nogridunstretched.mov
and
http://cognitrn.psych.indiana.edu/busey/forZyg/nogridstretched.mov
(If you view them, try to figure out what is different between the two
heads. Hint: one is
_not_ moving faster or covering more anglular extent).
The problem with POV comes when I add grids:
http://cognitrn.psych.indiana.edu/busey/forZyg/twistedgridunstretched.mov
and
http://cognitrn.psych.indiana.edu/busey/forZyg/twistedgridstretched.mov
I use CSG subtractions to add the grids on the faces (which are just
thin planes).
The problem with the grids is that I go from 7 minutes to render one
frame about 2 1/2 hours. This is on a sun workstation with version 3.05
(or something less than 3.1).
I suspect that the problem has something to do with I-Stack overflows.
I've appended the results below. It would be a big help to my research
program if anyone had hints about how to solve this problem. I can post
the relatively simple code if necessary.
Thanks so much
Tom Busey
Associate Professor
Department of Psychology and Program in Cognitive Science
Indiana University
Bloomington, IN
bus### [at] indianaedu
Here is the output:
050.pov Statistics (Partial Image Rendered), Resolution 2867 x 2150
----------------------------------------------------------------------------
Pixels: 1025640 Samples: 1284240 Smpls/Pxl: 1.25
Rays: 1284240 Saved: 0 Max Level: 1/5
----------------------------------------------------------------------------
Ray->Shape Intersection Tests Succeeded Percentage
----------------------------------------------------------------------------
Box 126484272 33198291 26.25
CSG Intersection 3513452 1604679 45.67
Mesh 1756726 354797 20.20
Sphere 3513452 1636191 46.57
Bounding Box 40422587 11333615 28.04
----------------------------------------------------------------------------
Calls to Noise: 0 Calls to DNoise: 10
----------------------------------------------------------------------------
Shadow Ray Tests: 472486 Succeeded: 584
I-Stack overflows: 11333814
----------------------------------------------------------------------------
Smallest Alloc: 11 bytes Largest: 6815752
Peak memory used: 18080275 bytes
----------------------------------------------------------------------------
Time For Parse: 0 hours 2 minutes 33.0 seconds (153 seconds)
Time For Trace: 2 hours 4 minutes 46.0 seconds (7486 seconds)
Total Time: 2 hours 7 minutes 19.0 seconds (7639 seconds)
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Tom Busey wrote:
>
> [...]
>
> I use CSG subtractions to add the grids on the faces (which are just
> thin planes).
>
> The problem with the grids is that I go from 7 minutes to render one
> frame about 2 1/2 hours. This is on a sun workstation with version 3.05
> (or something less than 3.1).
>
> I suspect that the problem has something to do with I-Stack overflows.
> I've appended the results below. It would be a big help to my research
> program if anyone had hints about how to solve this problem. I can post
> the relatively simple code if necessary.
>
Because of the I_Stack overflows i persume you are using quite a complex
CSG construction wich can slow things down a lot. Since i don't have
quicktime installed, i wasn't able to view the movies so i can't say for
sure. Some pictures or a mpeg would help (you can post it in one of the
binaries groups).
Since this seems no unix-specific question, it would be better to ask in
povray.newusers or povray.advanced-users, feel free to set a followup.
Christoph
--
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
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