> As long as I'm on this subject, I should point out that a lot of stained
> glass isn't crystal clear or consistently colored. A good deal of
> stained glass is milky-looking, or has milky-looking swirls in it; some
> is clear but too dark to really see anything through, and small
> variations in color, color intensity, and transparency/milkiness are
> common. If you don't already have a pretty good idea of what stained
> glass is really like, it would be wise to hunt down some photos to study.
>
> -Xplo

Thanks, Xplo.  This was very informative, and I'll do some more research.
Apparently my uneducated eye hasn't noticed some of the things you've
mentioned.

- How

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How Camp wrote:
> However, I'm not sure if this is really possible, or if it's the easiest way
> to create this stained-glass effect.  Can one come up with a method to
> 'color in' a piece of the crackle pattern?
> 
> My latest sad and sorry attempt is attached.  I need to somehow know what
> the color is behind each of these pieces.  The center color, average color,
> whatever.  Something that allows me to transform each crackle 'piece' into a
> solid color.
> 
Well, here's my version - the idea is based on some old pigment swirling 
code of mine.

I'll post the code in p.b.s-f shortly.

Bye for now,
	Mike Andrews.

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Attachments:
Download 'cr_solid_test.jpg' (68 KB)

Preview of image 'cr_solid_test.jpg'

"Michael Andrews" <m.c### [at] readingacuk> wrote in message
news:3df0d6eb@news.povray.org...

> Well, here's my version - the idea is based on some old pigment swirling
> code of mine.

Mike, I failed to reply in a timely manner, however your code is exactly
what I was looking for.  Thanks, I appreciate it.  I've learned some new
techniques.  As for my original quest for stained glass, this thread has
changed my goals, I think.  I'm trying to find a method that yields more
realistic results.

Your code has produced some fun (albiet amateur-ish) results for me, though!
It actually solved a totally different problem I was having with textures.
Thanks for that, too.  :)

- How

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"How Camp" <kro### [at] hotmailcom> wrote in message
news:3df8f54e@news.povray.org...
>
> "Michael Andrews" <m.c### [at] readingacuk> wrote in message
> news:3df0d6eb@news.povray.org...
>
> > Well, here's my version - the idea is based on some old pigment swirling
> > code of mine.
>
> Mike, I failed to reply in a timely manner, however your code is exactly
> what I was looking for.  Thanks, I appreciate it.  I've learned some new
> techniques.  As for my original quest for stained glass, this thread has
> changed my goals, I think.  I'm trying to find a method that yields more
> realistic results.
>
> Your code has produced some fun (albiet amateur-ish) results for me,
though!
> It actually solved a totally different problem I was having with textures.
> Thanks for that, too.  :)
>
> - How
>
>


I have yet to find a good way to programmatically carve up an image into
stained glass panes, for my own renderings I've resorted to drawing what I
want and scanning it in.

For realism I use masks of the original scanned image to 'carve' isosurfaces
into colored glass and lead objects I combine into a window. You can see two
my images that used this technique as well as some explanations and
in-progress renderings here: http://www.angelfire.com/weird2/gonk/ You can
get a good close up view of the window in the first one (Ahh Sunlight) near
the bottom of its page.

If you want to look at the code you can hunt up the IRTC entries and
download the ZIP files or e-mail me at jef### [at] twilightfaircom and I'll send
them along.

- Jeff

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