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From: clipka
Subject: Backlight
Date: 30 Jul 2009 01:50:00
Message: <web.4a71339a7f799d0174340c00@news.povray.org>
A room with curtains and other semi-transparent thingumajigs illuminated from
behind.

This shot uses some brand-new experimental POV-Ray 3.7 beta code, in an attempt
to show off, interacting with photons and high-depth radiosity (4 recursions,
though 2 would have sufficed). No media involved whatsoever.

50 minutes total render time on a Core i7 2.7GHz Quad system, mostly due to
radiosity and photons.

The POV-Ray patch allows surfaces to pick up illumination from the back side,
similar to the "double_illuminate" feature, but capable of
interoperating with photons and radiosity, as well as allowing to control the
effect's intensity.


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From: clipka
Subject: Re: Backlight
Date: 30 Jul 2009 01:55:01
Message: <web.4a7134c5cabb464774340c00@news.povray.org>
Duh, forgot the most important part...!


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Attachments:
Download 'diffuse_back.jpg' (36 KB)

Preview of image 'diffuse_back.jpg'
diffuse_back.jpg


 

From: Bill Pragnell
Subject: Re: Backlight
Date: 30 Jul 2009 04:15:01
Message: <web.4a715650cabb46476dd25f0b0@news.povray.org>
"clipka" <nomail@nomail> wrote:
> Duh, forgot the most important part...!

Spectacular! Can't wait to see this in the 'live' beta.


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From: Thomas de Groot
Subject: Re: Backlight
Date: 30 Jul 2009 05:33:44
Message: <4a7168f8$1@news.povray.org>
"clipka" <nomail@nomail> schreef in bericht 
news:web.4a71339a7f799d0174340c00@news.povray.org...
>A room with curtains and other semi-transparent thingumajigs illuminated 
>from
> behind.
>
> This shot uses some brand-new experimental POV-Ray 3.7 beta code, in an 
> attempt
> to show off, interacting with photons and high-depth radiosity (4 
> recursions,
> though 2 would have sufficed). No media involved whatsoever.
>
> 50 minutes total render time on a Core i7 2.7GHz Quad system, mostly due 
> to
> radiosity and photons.
>
> The POV-Ray patch allows surfaces to pick up illumination from the back 
> side,
> similar to the "double_illuminate" feature, but capable of
> interoperating with photons and radiosity, as well as allowing to control 
> the
> effect's intensity.


That looks really good indeed! Excellent work.

Thomas


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From: Mike Raiford
Subject: Re: Backlight
Date: 30 Jul 2009 09:31:21
Message: <4a71a0a9@news.povray.org>
clipka wrote:
> Duh, forgot the most important part...!
> 
> 
> ------------------------------------------------------------------------
> 

Very nice :) Can't wait to play with it! :D

-- 
~Mike


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From: clipka
Subject: Re: Backlight
Date: 30 Jul 2009 11:10:00
Message: <web.4a71b783cabb4647a13874630@news.povray.org>
Seems to make some decent fake subsurface scattering as well.

The left one is a backlit-only 100% white sphere, with a smaller sphere of the
desired color embedded inside; radiosity was set to 3 recursions.


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Preview of image 'diffuse_back_sss.jpg'
diffuse_back_sss.jpg


 

From: Darren New
Subject: Re: Backlight
Date: 30 Jul 2009 11:51:09
Message: <4a71c16d$1@news.povray.org>
clipka wrote:
> The left one is a backlit-only 100% white sphere, with a smaller sphere of the
> desired color embedded inside; radiosity was set to 3 recursions.

I think that's how blender implements SSS too, except it puts the white 
solid inside and the translucent color over the top. (I'm guessing just by 
looking at it doing the actual rendering.)

-- 
   Darren New, San Diego CA, USA (PST)
   "We'd like you to back-port all the changes in 2.0
    back to version 1.0."
   "We've done that already. We call it 2.0."


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From: stbenge
Subject: Re: Backlight
Date: 30 Jul 2009 13:34:53
Message: <4a71d9bd@news.povray.org>
clipka wrote:
> This shot uses some brand-new experimental POV-Ray 3.7 beta code, in an attempt
> to show off, interacting with photons and high-depth radiosity (4 recursions,
> though 2 would have sufficed). No media involved whatsoever.
> 
> The POV-Ray patch allows surfaces to pick up illumination from the back side,
> similar to the "double_illuminate" feature, but capable of
> interoperating with photons and radiosity, as well as allowing to control the
> effect's intensity.

Looks pretty nice! Do you think this patch will make it into the 
official releases?


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From: clipka
Subject: Re: Backlight
Date: 30 Jul 2009 14:30:01
Message: <web.4a71e6a5cabb4647a13874630@news.povray.org>
stbenge <" <-"@hotmail.com> wrote:
> Looks pretty nice! Do you think this patch will make it into the
> official releases?

I can't say for sure (that'll be ultimately up to Chris Cason, who is currently
busy somewhere abroad), but I expect so. It is actually quite an easy and
straightforward change, with not much risk of breaking any of the existing
stuff (there's probably more lines of code in the sample scene than in the
patch :P) and I think the test shots clearly prove its potential.

So yes, I'm quite confident it will be released as an experimental feature in
beta 34.

Looking forward to seeing what all you guys out there will make of it.


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From: Alain
Subject: Re: Backlight
Date: 30 Jul 2009 16:26:56
Message: <4a720210@news.povray.org>

> Duh, forgot the most important part...!
> 
> 
> ------------------------------------------------------------------------
> 
Gime! Gime! Gime!

Looks realy good. Any timeline to it's inclusion into a future beta?



Alain


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