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What do you think about the radiosity on this scene? Seems correct for a
little room with indirect sunlight?
--
Jaime Vives Piqueres
La Persistencia de la Ignorancia
http://www.ignorancia.org
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Attachments:
Download 'faked_rad.jpg' (14 KB)
Preview of image 'faked_rad.jpg'
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On Wed, 28 Aug 2002 09:46:25 +0200, Jaime Vives Piqueres
<jai### [at] ignorancia org> wrote:
> What do you think about the radiosity on this scene? Seems correct for a
> little room with indirect sunlight?
Somehow I feel it incorrect. Transition from dark to light on the same areas
seems unnatural but it can be illusion and/or result of blur. Before showing
what trick you have used (I assume it gives very fast rendering) please send
real radiosity version for comparision.
ABX
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It doesn't look right to me for this reason: there is a very strong tint of
color on the walls and floor near the red, green, and blue objects
(especially the green one), but for such a strong tint, it fades too quickly
farther away from the objects. Maybe the colors are canceling each other
out?
Regards,
-Dave Blandston
"Jaime Vives Piqueres" <jai### [at] ignoranciaorg> wrote in message
news:3d6c7de8@news.povray.org...
> What do you think about the radiosity on this scene? Seems correct for a
> little room with indirect sunlight?
>
> --
> Jaime Vives Piqueres
>
> La Persistencia de la Ignorancia
> http://www.ignorancia.org
Post a reply to this message
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ABX wrote:
> Somehow I feel it incorrect. Transition from dark to light on the same
> areas seems unnatural but it can be illusion and/or result of blur.
Yes, I feel also the same. It's a side-effect of the trick used, but I
will try to minimize it. Blur doesn't has nothing to do with it, and
perhaps helps hidding the fact.
> Before showing what trick you have used (I assume it gives very fast
> rendering) please send real radiosity version for comparision.
That's the problem, and my motivation to do the trick: I can't get that
kind of lighting only with pure rad and one light_source outside. Surely
it's possible, but I've not the patience needed to find and test the high
quality settings... I'm very lazy, do you remember? :)
The original image on the first post uses an extra area_light placed
carefully on the window hole, to simulate the external rad coming in, with
"Radiosity_Normal". The image called "faked_rad_normal.jpg" shows the same
setup with only the outside light (almost no visible rad effect). The image
"faked_rad_no-aa.jpg" uses also the same tricky extra light, but without
the area_light statement (to show better how it is placed).
I've tried this trick on my "alchlab" image done with Megapov, but seems
that it works better with 3.5. I will try to add an spotlight statement
automated to follow the sun position, to give it a more directional look.
--
Jaime Vives Piqueres
La Persistencia de la Ignorancia
http://www.ignorancia.org
Post a reply to this message
Attachments:
Download 'faked_rad_no-aa.jpg' (9 KB)
Download 'faked_rad_normal.jpg' (3 KB)
Preview of image 'faked_rad_no-aa.jpg'
Preview of image 'faked_rad_normal.jpg'
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Dave Blandston wrote:
> It doesn't look right to me for this reason: there is a very strong tint
> of color on the walls and floor near the red, green, and blue objects
> (especially the green one), but for such a strong tint, it fades too
> quickly farther away from the objects. Maybe the colors are canceling each
> other out?
Your right: seems the tint is a bit excessive. But not too much, I think:
I've been looking at real situations and some surfaces with intense colors
seem to behave this way, in an very directinal way. I think it's a side
effect of having actually two light sources: it increases the tint effect
of radiosity.
--
Jaime Vives Piqueres
La Persistencia de la Ignorancia
http://www.ignorancia.org
Post a reply to this message
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