POV-Ray : Newsgroups : povray.binaries.images : reflection - refraction Server Time
16 Nov 2024 16:14:27 EST (-0500)
  reflection - refraction (Message 1 to 9 of 9)  
From: Dennis Clarke
Subject: reflection - refraction
Date: 17 Dec 2002 16:39:01
Message: <3DFF986E.20E96272@interlog.com>
I'm not too sure what is resonable for render times with a lot of reflection
and refraction.   I had the following in my .pov file : 

global_settings { assumed_gamma 2.2
                  max_trace_level 20
                  max_intersections 128
                  ambient_light color <0.7, 0.7, 0.7>  }

The following image is taken from a 8192x6160 render thus : 

$ time -p /usr/local/povray31/povray_sparc_v9a -I./input/tet5.pov \
> -L/usr/local/povray31/include +W8192 +H6160 +V +X8192 +B4096 \
> +FT +O./tet5_8192x6160.tga +HTT +HN./tet5_cpu_8192x6160.tga +Q9 \
> +A0.3 +AM2 +R3 +GA +KC +K0.382
Persistence of Vision(tm) Ray Tracer Version 3.1g.SunOS.cc
  This is an unofficial version compiled by:
   Dennis M. Clarke   dcl### [at] blastwavecom
  The POV-Ray Team(tm) is not responsible for supporting this version. 
.
.
.
Done Tracing
./input/tet5.pov Statistics, Resolution 8192 x 6160
----------------------------------------------------------------------------
Pixels:        50462720   Samples:        82028453   Smpls/Pxl: 1.63
Rays:         316574997   Saved:          37525654   Max Level: 20/20
----------------------------------------------------------------------------
Ray->Shape Intersection          Tests       Succeeded  Percentage
----------------------------------------------------------------------------
Box                          826817185      3870963320     28.23
Cone/Cylinder               2109495242       147842577      7.01
CSG Intersection            2936312427       821313009      5.19
CSG Union                   3164242863       205469880      6.49
Plane                       3915083236       183872317     41.59
Sphere                      4143013672       960173638     62.28
Torus                       3164242863         9526603      0.30
Torus Bound                 3164242863        11093977      0.35
----------------------------------------------------------------------------
Roots tested:             11093977   eliminated:             4131413
Calls to Noise:          680401248   Calls to DNoise:      777807805
----------------------------------------------------------------------------
Shadow Ray Tests:       3045879343   Succeeded:            338358321
Reflected Rays:          159191456   Total Internal:        66185445
Refracted Rays:           75347907
Transmitted Rays:             7181
----------------------------------------------------------------------------
Smallest Alloc:                 20 bytes   Largest:        403701776
Peak memory used:        411535670 bytes
----------------------------------------------------------------------------
Time For Parse:    0 hours  0 minutes  55.0 seconds (55 seconds)
Time For Trace:   33 hours 39 minutes  25.0 seconds (121165 seconds)
    Total Time:   33 hours 40 minutes  20.0 seconds (121220 seconds)


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Attachments:
Download 'glass_refract_1.png' (602 KB)

Preview of image 'glass_refract_1.png'
glass_refract_1.png


 

From: Ben T  Scheele
Subject: Re: reflection - refraction
Date: 17 Dec 2002 17:18:25
Message: <3dffa2b1@news.povray.org>
That seems to be about right for a very large render with that high of a
trace level.  Some of my scenes get into the billions for tests of boxes and
bounds, such as my last post, which does use a lot of reflections and
refractions.  For only a 768 square it took three hours, but that's probably
due to the 9 photon emitting light sources.  What kind of lighting did you
use in your scene?  I've never heard of that enormous of an image being
rendered with povray.  I suppose somebody's probably tested the limits with
a simple scene before, but with one such as yours, I don't know.  Would you
please post the full image?  Resized and resampled of course.  I know we
won't be able to see all the nifty little details that way, but hey, have
mercy on us 56k'ers.   It's tough to tell from the current image what your
scene is, but I can see a sky and a landscape in the a reflection on a
corner of the abstract glassy object.  It's pretty cool.

-Ben Scheele


"Dennis Clarke" <dcl### [at] interlogcom> wrote in message
news:3DFF986E.20E96272@interlog.com...
>
> I'm not too sure what is resonable for render times with a lot of
reflection
> and refraction.   I had the following in my .pov file :


Post a reply to this message

From: Dennis Clarke
Subject: Re: reflection - refraction
Date: 17 Dec 2002 18:13:11
Message: <3DFFAE81.20226B65@interlog.com>
"Ben T. Scheele" wrote:
> 
>     That seems to be about right for a very large render with that high of a
> trace level.  Some of my scenes get into the billions for tests of boxes and
> bounds, such as my last post, which does use a lot of reflections and
> refractions.  For only a 768 square it took three hours, but that's probably
> due to the 9 photon emitting light sources.  What kind of lighting did you
> use in your scene?  I've never heard of that enormous of an image being
> rendered with povray.  I suppose somebody's probably tested the limits with
> a simple scene before, but with one such as yours, I don't know.  Would you
> please post the full image?  Resized and resampled of course.  I know we
> won't be able to see all the nifty little details that way, but hey, have
> mercy on us 56k'ers.   It's tough to tell from the current image what your
> scene is, but I can see a sky and a landscape in the a reflection on a
> corner of the abstract glassy object.  It's pretty cool.
> 
> -Ben Scheele

Well .. the image is a tad large for a 56K modem : 

$ ls -lap tet5_8192x6160.tga
-rw-r--r--   1 dclarke  other    151388178 Dec 17 12:09 tet5_8192x6160.tga 

The png images are much smaller.  I'll see if I can post them to my website.

As for limits I will attempt a 16384x12320 image tonight!

Dennis Clarke

Here is a bit of the CPU histogram for the image ...


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Attachments:
Download 'glass_refract_cpu_5.png' (552 KB)

Preview of image 'glass_refract_cpu_5.png'
glass_refract_cpu_5.png


 

From: Aaron
Subject: Re: reflection - refraction
Date: 17 Dec 2002 18:32:18
Message: <3dffb402@news.povray.org>
Could you post as jpeg?  Its huge as a png!  :)

> I'm not too sure what is resonable for render times with a lot of
reflection
> and refraction.   I had the following in my .pov file :


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From: Slime
Subject: Re: reflection - refraction
Date: 18 Dec 2002 00:35:21
Message: <3e000919$1@news.povray.org>
Please, stop posting such large images. 800KB takes five to ten minutes to
download on a modem; it's quite annoying. Please take a small amount of time
to create a compressed JPG. Thanks.

(This would be in response to your second post in the thread but I didn't
want to download it and Outlook Newsreader wont let me respond to it until I
do.)

 - Slime
[ http://www.slimeland.com/ ]


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From: Ben T  Scheele
Subject: Re: reflection - refraction
Date: 18 Dec 2002 23:00:10
Message: <3e01444a@news.povray.org>
That's very cool.  I tried doing a histogram early on, but for a small
short render it wasn't very impressive.  I kind of forgot about doing that
until now.  I'll have to try it again.
    Oh, some people are so impatient, but I think it would be better if you
compressed the image more using jpeg format.

-Ben Scheele


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From: Dennis Clarke
Subject: Re: reflection - refraction
Date: 20 Dec 2002 09:59:13
Message: <3E032F36.44223EE9@interlog.com>
Slime wrote:
> 
> Please, stop posting such large images. 800KB takes five to ten minutes to
> download on a modem; it's quite annoying. Please take a small amount of time
> to create a compressed JPG. Thanks.


  Yeah yeah yeah .. I didn't want to lose the detail.

dc


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From: Dennis Clarke
Subject: Re: reflection - refraction
Date: 20 Dec 2002 09:59:37
Message: <3E032F4F.89EE85B5@interlog.com>
Aaron wrote:
> 
> Could you post as jpeg?  Its huge as a png!  :)
> 
> > I'm not too sure what is resonable for render times with a lot of
> reflection
> > and refraction.   I had the following in my .pov file :



   yes yes .. I will never let that happen again!  :)

  dc


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From: Dennis Clarke
Subject: Re: reflection - refraction
Date: 20 Dec 2002 10:00:22
Message: <3E032F7B.73A9E6A4@interlog.com>
"Ben T. Scheele" wrote:
> 
>     That's very cool.  I tried doing a histogram early on, but for a small
> short render it wasn't very impressive.  I kind of forgot about doing that
> until now.  I'll have to try it again.
>     Oh, some people are so impatient, but I think it would be better if you
> compressed the image more using jpeg format.

  Gee .. this is a thought that I have heard expressed a few times since I
posted.  I adjust my approach and try again.

dc


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