The images below are the same model, with one light source (the sun, lat 47
long -74 at 10am est).  The second was rendered with Radiance, and I love
the lighting.  The first was done in POV, and the lighting makes the chairs,
particularly the far one, look like they're floating.  Perhaps y'all could
point me in the right direction with radiosity in POV.  Here's my global
settings:

global_settings{
 assumed_gamma 1
 max_trace_level 5
 radiosity {
  pretrace_start 0.04
  pretrace_end   0.01
  count 200
  nearest_count 10
  error_bound 0.5
  recursion_limit 5
  low_error_factor .25
  gray_threshold 0.0
  minimum_reuse 0.0075
  brightness 1
  adc_bailout 0.01/2
 }
 ambient_light 0
}

Thanks

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Attachments:
Download 'dweller.jpg' (30 KB) Download '10_am_2_C1_avg.jpg' (24 KB)

Preview of image 'dweller.jpg'

Preview of image '10_am_2_C1_avg.jpg'

cadman wrote:
> 
> The images below are the same model, with one light source (the sun, lat 47
> long -74 at 10am est).  The second was rendered with Radiance, and I love
> the lighting.  The first was done in POV, and the lighting makes the chairs,
> particularly the far one, look like they're floating.  Perhaps y'all could
> point me in the right direction with radiosity in POV.  Here's my global
> settings:
> 
> [...]

Your textures seem to be completely different, especially the sky.

Christoph

-- 
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HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 31 Dec. 2002 _____./\/^>_*_<^\/\.______

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Those two images are very different. I have no comments about Radiance but
if you want to improve the version with POV:

1) The sky is dark blue and responsible for the different color inside the
house. A real sky on earth will always be much brighter when the sun is
present. So bright that it actually turns white on a monitor / camera, that
takes a picture inside a building... Try multiplying the sky colors with 7
or 8, for example.

2) Recursion limit does not need to be 5.. Every step needs higher and
higher radiosity settings, and the result will still look more and more
washed out. I suggest a limit of 2 or 3.

3) Instead of messing with the whole radiosity block, I always use
"rad_def.inc" to automate the setup, since Pov3.5 came out. It's much
easier. I only need to override one or two settings, sometimes. (That is
brightness and recursion limit).

4) Of course I assume you'll be using an area_light, and good anti-alias for
the next render, to remove some of those artifacts.

:o)

Regards,
Hugo

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"cadman" <REM### [at] povraycouk> wrote :
>
> Thanks

    I know nothing about radiosity that will be of any help, but I gotta
say, Man! I love those windows!

    I now want windows like that in my dream house (with the cool holder
clip). But they must be able to open all the way and still feel somewhat
balanced on the wall even if they are off center.

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I know your situation. Perhaps it would help, if you double your diffuse
settings in your textures and reduce the color of the lightsource.
At least this was helpful for me.


Norbert

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"Christoph Hormann" <chr### [at] gmxde> wrote in message
news:3E119D35.20AAEEC1@gmx.de...

> Your textures seem to be completely different, especially the sky.
>
> Christoph

Indeed, I did not have time to try and make textures match, since the two
renderers have very different ways of defining them (I just used some
presets in Radiance).

But don't you think there should be some diffuse shadows, or at least some
dark spots, under the stools?  I guess it boils down to me understanding the
radiosity parameters.  I've read the docs and tutorial at least a hundred
times, but still not sure which one(s) I need to change to get the results I
want.

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> But don't you think there should be some diffuse shadows,
> or at least some dark spots, under the stools?

No. The chairs are not in direct sunlight, and radiosity won't produce
shadows when there are walls all around and recursion_limit is 5 ... and the
sky is dark. :o)


-Hugo

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