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From: Ive
Subject: Spectral Rendering with POV-Ray
Date: 20 Sep 2012 18:25:46
Message: <505b5faa$1@news.povray.org>
The animation feature of POV-Ray can be used to make it a spectral 
render engine. The basic idea is to render a set of gray-scale images
  - each representing a specific wavelength - and finally combine them 
using the CIE color match function.
To simplify this task I have created a few POV-Ray SDL scripts and some 
examples.
You'll find the download link, some images and more explanation here:

http://www.lilysoft.org/CGI/SR/Spectral%20Render.htm

-Ive


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From: Stephen
Subject: Re: Spectral Rendering with POV-Ray
Date: 20 Sep 2012 20:35:50
Message: <505b7e26$1@news.povray.org>
On 20/09/2012 7:24 PM, Ive wrote:
> You'll find the download link, some images and more explanation here:
>
> http://www.lilysoft.org/CGI/SR/Spectral%20Render.htm

Thanks for posting.
The glasses are spectacular but, as much as Iâd like to, I donât have 
the time to experiment with your Spectral Rendering. It is a bit out of 
my league anyway.

I had not seen 'Bist Du noch da' before and for that alone it was worth 
the visit. I have seen and liked 'In The Mood For Love' and will search 
for a copy of Wong Kar-Wayâs 2048 or is it 2046? (Do I see a geekâs typo 
;-) )
I also like you music and that is saying something from someone who 
thinks anything after the 18th Century is a bit too modern.
Just Like A William Powell (lookin' for that Myrna Loy) I enjoyed but it 
reminded me of a tune that I just canât put my finger on.

Bloody Hell! It sounds like a slow tempo Muppets theme. Tell me that I 
am wrong. ;-)


-- 
Regards
     Stephen


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From: Jaime Vives Piqueres
Subject: Re: Spectral Rendering with POV-Ray
Date: 21 Sep 2012 09:11:23
Message: <505c2f3b$1@news.povray.org>
On 20/09/12 20:24, Ive wrote:
> The animation feature of POV-Ray can be used to make it a spectral
> render engine. The basic idea is to render a set of gray-scale images
> - each representing a specific wavelength - and finally combine them
> using the CIE color match function. To simplify this task I have
> created a few POV-Ray SDL scripts and some examples. You'll find the
> download link, some images and more explanation here:
>
> http://www.lilysoft.org/CGI/SR/Spectral%20Render.htm
>

   Oh, well...  just what I needed: another very interesting thing which
I don't have the time to try out, but which I will surely try out anyhow. ;)

   BTW, I love POV-Ray... and your usage of it here shows exactly why:
it's an endless source of fun and surprises.



P.S.: The typical "Great work!" remark falls short here...

--
Jaime


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From: Thomas de Groot
Subject: Re: Spectral Rendering with POV-Ray
Date: 21 Sep 2012 11:23:30
Message: <505c4e32$1@news.povray.org>
<sigh>
Why is life so short?
Why have days only 24 hours?
Why is there real life?
Why do I love POV-Ray so much?

Thomas


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From: Ive
Subject: Re: Spectral Rendering with POV-Ray
Date: 21 Sep 2012 14:41:31
Message: <505c7c9b@news.povray.org>
Am 20.09.2012 22:35, schrieb Stephen:
> The glasses are spectacular but, as much as Iâd like to, I donât have
> the time to experiment with your Spectral Rendering. It is a bit out of
> my league anyway.
>
Don't say that. I've spend a lot of time making its usage intuitive. 
Maybe I failed but I would welcome feedback on that matter to improve 
my didactic skills - I know that I suck in explaining things.

> I had not seen 'Bist Du noch da' before and for that alone it was worth
> the visit. I have seen and liked 'In The Mood For Love' and will search
> for a copy of Wong Kar-Wayâs 2048 or is it 2046? (Do I see a geekâs typo
> ;-) )
Aaargh! You are so right! Why the heck does 2048 look so much more 
natural to me ;)

> I also like you music and that is saying something from someone who
> thinks anything after the 18th Century is a bit too modern.
You've mentioned this before and I still find it surprising. Especially 
since I do listen to almost all kinds of music of different styles and 
era but I'll have to admit that the 18th and 19th century is the deepest 
gap within my musical horizon. Well, I know all the "hits" all the 
symphonies and all the stuff everybody knowns but it fails to touch me. 
On the other hand, just recently I discovered Mozart's string quintets 
and I really do love them. Maybe a question of getting older?


> Just Like A William Powell (lookin' for that Myrna Loy) I enjoyed but it
> reminded me of a tune that I just canât put my finger on.
>
> Bloody Hell! It sounds like a slow tempo Muppets theme. Tell me that I
> am wrong. ;-)
>
Haven't heard the Muppets theme since over a decade but I guess you are 
not wrong ;)
Actually the main theme of "Just Like A William Powell" is based on the 
typical "roaring 20ies" Charleston chord progression and I think the 
Muppets-theme uses the same chords.
But the piano bridge between the verses of "...William Powell" cites a 
famous German tune from the 20ies (or 30ies, not sure) called "Ich 
brauche keine Millionen, mir fehlt kein Pfennig zum Glück" (rough 
translation: "Don't need millions, don't miss a penny for 
happiness/luck". Finally the instrumental part is bases on "Katz' Rag" 
(named after the composer) and this was one of the very first tunes I 
played on acoustic guitar when I was learning ragtime finger-picking 
style. To put it like John Renbourn (one of my favorite British 
guitarists): "I've always tried to play like Big Bill Broonzy - and I'm 
still trying!"

For short, as I have actually nothing to say and do not consider myself 
an artist I do with music the same as I do with my POV-Ray images: pack 
them full with tiny references and citations in an attempt to make them 
appear more interesting, but I guess it is not working that way, 
...nonetheless I'll keep trying.

-Ive


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From: Ive
Subject: Re: Spectral Rendering with POV-Ray
Date: 21 Sep 2012 14:47:15
Message: <505c7df3@news.povray.org>
Am 21.09.2012 11:11, schrieb Jaime Vives Piqueres:

>    Oh, well...  just what I needed: another very interesting thing which
> I don't have the time to try out, but which I will surely try out
> anyhow. ;)

I'm sorry for that ;)

>    BTW, I love POV-Ray... and your usage of it here shows exactly why:
> it's an endless source of fun and surprises.
>
Yes, the same here! Especially POV-Ray's scripting power makes it 
possible to always find new things to explore. On the other hand (and 
just to mention it) "pro" render engines (V-Ray and the like...) use 
spectral rendering since years.

- Ive


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From: Ive
Subject: Re: Spectral Rendering with POV-Ray
Date: 21 Sep 2012 14:50:12
Message: <505c7ea4$1@news.povray.org>
Am 21.09.2012 13:23, schrieb Thomas de Groot:
> <sigh>
> Why is life so short?
> Why have days only 24 hours?
> Why is there real life?
> Why do I love POV-Ray so much?
>
While I understand that these questions are just rhetoric I still feel 
tempted to answer all of them. But as this goes completely OT just 
number three: Because otherwise - for the lack of recreation - humankind 
would be extinct within a few years.

;) -Ive


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From: nemesis
Subject: Re: Spectral Rendering with POV-Ray
Date: 21 Sep 2012 15:30:01
Message: <web.505c877b8647b6ff352a052d0@news.povray.org>
Ive <ive### [at] lilysoftorg> wrote:
> The animation feature of POV-Ray can be used to make it a spectral
> render engine. The basic idea is to render a set of gray-scale images
>   - each representing a specific wavelength - and finally combine them
> using the CIE color match function.
> To simplify this task I have created a few POV-Ray SDL scripts and some
> examples.
> You'll find the download link, some images and more explanation here:
>
> http://www.lilysoft.org/CGI/SR/Spectral%20Render.htm
>
> -Ive

amazing


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From: Thomas de Groot
Subject: Re: Spectral Rendering with POV-Ray
Date: 22 Sep 2012 07:13:25
Message: <505d6515@news.povray.org>
On 21-9-2012 16:49, Ive wrote:
> While I understand that these questions are just rhetoric I still feel
> tempted to answer all of them. But as this goes completely OT just
> number three: Because otherwise - for the lack of recreation - humankind
> would be extinct within a few years.

<grin> Absolutely right.

I think you did a great job. I shall do what you ask and try this out, 
and report back if I find something difficult to understand. I have some 
experience in writing tutorials and I know it is not really easy. It 
needs feedback to get better.

Thomas


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From: Thomas de Groot
Subject: Re: Spectral Rendering with POV-Ray
Date: 22 Sep 2012 07:55:55
Message: <505d6f0b$1@news.povray.org>
Ive, I am working on it and writing down a file with comments on your 
tutorial. I hope to be finished today, otherwise tomorrow.

Thomas


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