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16 Nov 2024 12:25:14 EST (-0500)
  Lamp shade (~33 KB) (Message 1 to 5 of 5)  
From: Emerald Orchid
Subject: Lamp shade (~33 KB)
Date: 8 May 2005 07:44:31
Message: <427dfb9f@news.povray.org>
Just a little something I'm working on...

How do I make it so that the room is lit up in the yellowish glow
filtering through the yellow lamp shade?


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From: Xplo Eristotle
Subject: Re: Lamp shade (~33 KB)
Date: 8 May 2005 09:52:26
Message: <427e199a@news.povray.org>
Emerald Orchid wrote:
> Just a little something I'm working on...
> 
> How do I make it so that the room is lit up in the yellowish glow
> filtering through the yellow lamp shade?

Radiosity.. but you'll need a really high count to get good results 
since the shade is so small compared to the rest of the scene.

If you want to cheat, add a second light_source (dim yellow, natch) in 
the same place as the first one, but use projected_though to make it 
only shine through the lampshade.. at least, I think that'll work. I 
expect you'll want to use the same area light settings as for your 
primary light_source.

-Xplo


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From: Tim Nikias
Subject: Re: Lamp shade (~33 KB)
Date: 8 May 2005 09:55:07
Message: <427e1a3b@news.povray.org>
> How do I make it so that the room is lit up in the yellowish glow
> filtering through the yellow lamp shade?

Well, what technique are you currently using for the lighting? You probably
have to use "filter" on the shade and maybe make the lightsource a little
stronger that it stills shows after getting filtered. I tend to exagherate
things first to get the correct effect, and then tweak the values to a
realistic output.

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


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From: Burki
Subject: Re: Lamp shade (~33 KB)
Date: 8 May 2005 13:35:00
Message: <web.427e4cab8c00b097d61e8c370@news.povray.org>
If you want to light up only the walls in yellowish:

Check if the light source has a yellowish color and
check that in the finish of thee walls and floor "metallic" is set in the
reflection {} item.

If the air should be lit, you will need the media statement.

Is this what you meant ?

Burki


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From: Emerald Orchid
Subject: Re: Lamp shade (~33 KB)
Date: 9 May 2005 16:26:57
Message: <427fc791$1@news.povray.org>
> Well, what technique are you currently using for the lighting? You probably
> have to use "filter" on the shade and maybe make the lightsource a little
> stronger that it stills shows after getting filtered. I tend to exagherate
> things first to get the correct effect, and then tweak the values to a
> realistic output.

Is it filter or transmit? I can *never* remember which is which... :-(

As you probably know, the shade is currently double illuminated, and the
light is an area light. (The scene also uses radiosity; it looks wrong
without it.)

Anyway, I'll give at a go and see what happens...


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