> This is a really good example how smooth and appealing lighting in such
> a scene can be done in POV-Ray with quite reasonable render times (care
> to mention?)

I've written a post in reply to my image which covers the radiosity-settings
and the rendering times for the two passes. Since so many asked, I only went
through the hassle of answering once. :-)

> And i think the lighting - despite not being highly accurate - is better
> than in a lot of images of similar scenes done with commercial renderers.

High praise (though most of it goes to POV-Ray, but I had a little influence
in it. :-) Thank you very much!

But I agree totally, there are quite a few commercial renderers which I find
truly lacking, though one could argue that if an experienced User would sit
at it, he/she would get good results too. It's not like this is the first
time I've played with radiosity. :-)

Regards,
Tim

-- 
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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> Very nice image!

Thank you!

> I'm wondering what was the rendering time and what radiosity settings have
> you used? The radiosity looks very well. My attempts were never so good,
> though they've taken many hours to render.

I've written a reply to my original post, so that I wouldn't have to post
the same answer in concern of radiosity-settings to every one. I'm a bit
lazy, I admit it. :-)

Regards,
Tim

-- 
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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First off, thanks to all for the praise, it's nice to get some good feedback
and feel proud to have accomplished something that's worth noting. :-)

As several have voiced questions concerning the rendering-times and the
radiosity-settings, here's the radiosity-block from the global_settings:

  radiosity{
    #if (Save)
      pretrace_start 0.2
      pretrace_end 0.0125
      save_file "windows.rad"
      error_bound 0.1
    #else
      pretrace_start 1
      pretrace_end 1
      load_file "windows.rad"
      error_bound 0.8
    #end
    recursion_limit 2
    minimum_reuse 0.01
    nearest_count 10
    count 900
    brightness 2.0
    always_sample off
  }

I simply #declare Save in the beginning to decide if I'm doing the 1st Pass
(collecting lots of samples and save it) or the 2nd Pass
(combining/averaging several samples by using a higher error_bound).

My PC is a 2.4Ghz Athlon XP running on Win2000 with 768MB DDR-RAM.

The 1st Pass took 13 minutes, but the pretracing went real fast and the
final render took quite long. No glass, backdrops or complex textures used
in that pass, but I kept the floor and the metal parts on the windows
slightly reflective.

The 2nd Pass rendering, with Anti-Aliasing at 800x600 with +am2 +a0.2 +r2
took 15 minutes.

Note that I've described this technique on my website as well, and the
origins of the two-pass render are in these same newsgroups, developed by
various Povers quite some time ago, so I don't claim full responsibility for
the good outcome. :-)

-- 
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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> That's a really neat image...

Thanks!

> I've always wanted to make a CG image that
> looks "sunny". But bathing everything in slightly yellow light just
> makes everything look... slightly yellow. :-S

Well, I guess usually, sunlight is more white than yellow, and only tends to
get orange/reddish at early or late times. So maybe you just picked the
wrong color? Ambient colors also play a major role. There's no shame in
looking at photographs and using the RGB-Values from there... :-)

-- 
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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I have to take my comment about the artifact above the left window back.
Just noticed today that I actually accidently had the window pass on through
the ceiling, so the "artifact" was in fact a proper reflection. Thus, the
radiosity doesn't have to be tweaked to get even better results, as you will
see when I post updates.

Regards,
Tim

-- 
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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As other's have said, very nice!

However, one thing seems wrong to me. The outside landscape and sky is 
rather dull compared to how brightly illuminated the inside of the room is. 
The sunlight completely over-saturates the white walls where it hits them, 
yet the landscape outside seems not particularly brightly illuminated by the 
sun?

The attached image looks more "real" to me, but it might just be me.

Rune
-- 
3D images and anims, include files, tutorials and more:
rune|vision:  http://runevision.com
POV-Ray Ring: http://webring.povray.co.uk

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Attachments:
Download 'windows_bright.jpg' (30 KB)

Preview of image 'windows_bright.jpg'

> The attached image looks more "real" to me, but it might just be me.

Good observation! Yes, I agree with you, but wanted to work on the
background once everything else is in place. Especially since I'll be
fiddling around with the lighting as the image progresses, I was planning on
adjusting the background-image in the final-stages.

Regards,
Tim

-- 
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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> The two-pass technique is also described on my website, here:
> http://www.nolights.de/projects/radiosity/radiosity.html
> 

thanks! Just browsed your site...

bye,
gert

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"Joanne Simpson" <cor### [at] onewhiteravencom> wrote:
> > I plan on creating a couch or
> > a nice armchair to make this a habitable image. The backdrop was rendered...
> > Nah. It's a photo. The floor is a photo from a floor in our house.
>
> If you would like a nice leather sofa, feel free to use this one:
> http://www.onewhiteraven.com/povray_models/pages/image006.php
> Wings3D model on request if you want to tweak the sagginess of the seats or
> move the cushions.
> Joanne

I would like to take a look at your models. However, my browser (Firefox)
says that it can not find onewhieraven.com. I have clicked on your link and
typed it into the address line.

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MontanaSteve nous apporta ses lumieres en ce 2005-08-26 14:21:
> "Joanne Simpson" <cor### [at] onewhiteravencom> wrote:
> 
>>>I plan on creating a couch or
>>>a nice armchair to make this a habitable image. The backdrop was rendered...
>>>Nah. It's a photo. The floor is a photo from a floor in our house.
>>
>>If you would like a nice leather sofa, feel free to use this one:
>>http://www.onewhiteraven.com/povray_models/pages/image006.php
>>Wings3D model on request if you want to tweak the sagginess of the seats or
>>move the cushions.
>>Joanne
> 
> 
> I would like to take a look at your models. However, my browser (Firefox)
> says that it can not find onewhieraven.com. I have clicked on your link and
> typed it into the address line.
> 
I did connect earlier, but now I can't. There must be some problem with the server.

Alain

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