In the first image, the portal is the sphere in the middle...the "far 
end" of the portal is just a larger sphere surrounding the scene.
The second image is a small, closed room with a portal to an open area. 
The room is lit entirely by light from the portal. As you see, no direct 
light can pass through the portal...one of the limitations of my patch.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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Attachments:
Download 'Portal pigment 2.jpeg.jpg' (16 KB) Download 'Portal pigment 3.jpeg.jpg' (5 KB)

Preview of image 'Portal pigment 2.jpeg.jpg'

Preview of image 'Portal pigment 3.jpeg.jpg'

This'd be great for doing cubist work.

--
David Fontaine  <dav### [at] faricynet>  ICQ 55354965
My raytracing gallery:  http://davidf.faricy.net/

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[This followup was posted to povray.binaries.images and a copy was sent 
to the cited author.]

In article <chrishuff-7CBC3C.17374621012001@news.povray.org>, 
chr### [at] maccom says...
> In the first image, the portal is the sphere in the middle...the "far 
> end" of the portal is just a larger sphere surrounding the scene.
> The second image is a small, closed room with a portal to an open area. 
> The room is lit entirely by light from the portal. As you see, no direct 
> light can pass through the portal...one of the limitations of my patch.
> 

Could you please explain to a mere mortal person what is shown in your 
'portal' images?? 
What is a portal? 
I have the feeling I miss something important here :)
-- 
Regards,  Sander

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In article <MPG### [at] NEWSPOVRAYORG>, Sander Stols 
<san### [at] stolscom> wrote:

> Could you please explain to a mere mortal person what is shown in your 
> 'portal' images?? 
> What is a portal? 
> I have the feeling I miss something important here :)

Hmm...well, you know what a wormhole is? And I'm not talking about the 
kind made by slimy burrowing invertebrates...I mean the relative to 
black holes.
The portal pigment basically links one area of space to another...kind 
of a "magic mirror" effect. You can see into a different area by looking 
into the portal, and you can set things up so you see the portal itself 
through the portal, producing a "hall of mirrors" effect. However, this 
is done by changing the color of a pigment to what would be visible 
through that point on the portal.

You will also be able to set it up to act like a video monitor showing 
output from a camera, a less interesting but probably more practical 
application.

If you have trouble visualizing it, don't worry...it gives me headaches, 
and I'm still not quite sure why type 0 works. Or sure that it does.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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In article <chrishuff-F48A36.17143522012001@news.povray.org>, 
chr### [at] maccom says...
> 
> Hmm...well, you know what a wormhole is? 
Yes
> And I'm not talking about the 
> kind made by slimy burrowing invertebrates...I mean the relative to 
> black holes.
> The portal pigment basically links one area of space to another...kind 
> of a "magic mirror" effect. You can see into a different area by looking 
> into the portal, and you can set things up so you see the portal itself 
> through the portal, producing a "hall of mirrors" effect. However, this 
> is done by changing the color of a pigment to what would be visible 
> through that point on the portal.
I don't see where the pigment comes in. How can a pigment link one thing 
to another?
> You will also be able to set it up to act like a video monitor showing 
> output from a camera, a less interesting but probably more practical 
> application.
> 
> If you have trouble visualizing it, don't worry...it gives me headaches, 
> and I'm still not quite sure why type 0 works. Or sure that it does.
Perhaps a very simple piece of example code could work??
 

-- 
Regards,  Sander

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In article <MPG### [at] NEWSPOVRAYORG>, Sander 
<san### [at] stolscom> wrote:

> I don't see where the pigment comes in. How can a pigment link one thing 
> to another?

The color of the pigment at each point is the color of the part of the 
scene seen through that point.


> > If you have trouble visualizing it, don't worry...it gives me 
> > headaches, 
> > and I'm still not quite sure why type 0 works. Or sure that it does.

The headaches came from a misunderstanding of a POV function...and it 
works perfectly.


> Perhaps a very simple piece of example code could work??

I doubt it...the syntax is just "portal_pigment {TYPE, PARAMETERS 
TRANSFORMS}", with the simplest syntax being "portal_pigment". You apply 
the pigment to the object, set the ambient to 1 if you don't want the 
pigment to be shaded, and transform the object and far end of the portal 
to the desired positions (unless you are using a camera portal), and 
that's it.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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