In a lot of my POV-Ray works I turned a rather boring image into something
interesting by simply distorting the entire image using refraction.

Before: https://i.imgur.com/itjSZwn.jpg
After: https://mscharrer.net/povray/liquid_fire/2/liquid_fire_v2.jpg

The code that makes the difference:
plane{
 z (-1)
 hollow
 interior {
  ior 1.7
 }
 pigment {
  rgbt 1
 }
 normal {
  granite 0.07
  scale 0.5
 }
}

Has anyone used a similar trick before? If yes, please show me the results.

Michael Scharrer, https://mscharrer.net

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> Has anyone used a similar trick before? If yes, please show me the results.


Hi Michael,

four sources come into my mind -

using camera with normals to distort an image as a whole are rare, but look at
David Morgan-Mar  Monet's Garden in Giverny
http://www.irtc.org/ftp/pub/stills/1999-12-31/dmmonet.jpg

two sources distort images via post-processing

Tor Olav Kristensen  Source code for "Using functions to distort images"
http://news.povray.org/povray.text.scene-files/message/%3C4470f87e%40news.povray.org%3E/#%3C4470f87e%40news.povray.org%
3E

Samuel T. Benge  aberrate36.pov
http://news.povray.org/povray.text.scene-files/thread/%3C49681241@news.povray.org%3E/?ttop=397431&toff=50

Samuels code uses normals and dispersion, but not an ior different from 1.

and the fourth source uses ior 1.4 and dispersion, but not normals - Tekno
Frannansa  photo-style short code
http://news.povray.org/povray.binaries.images/message/%3C489a283e%40news.povray.org%3E/#%3C489a283e%40news.povray.org%3
E

Tek used some more effects in his winning IRTC entry Elements, but again - no
normals - http://www.irtc.org/ftp/pub/stills/2005-10-31/elements.jpg

So, your trick is imho new.

By the way, thanks for your nice gallery. My personal favourite is "growth", but
most of the others are very good too. The minimalistic style of your gallery
reminds me a bit of Margus Ramst`s homepage (
http://www.hot.ee/margusrt/eng/main.html ).

So, keep on poving...

Norbert Kern

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"Norbert Kern" <nor### [at] t-onlinede> wrote:
> > Has anyone used a similar trick before? If yes, please show me the results.
>
>
> Hi Michael,
>
> four sources come into my mind -
>
> using camera with normals to distort an image as a whole are rare, but look at
> David Morgan-Mar  Monet's Garden in Giverny
> http://www.irtc.org/ftp/pub/stills/1999-12-31/dmmonet.jpg
>
> two sources distort images via post-processing
>
> Tor Olav Kristensen  Source code for "Using functions to distort images"
>
http://news.povray.org/povray.text.scene-files/message/%3C4470f87e%40news.povray.org%3E/#%3C4470f87e%40news.povray.or
g%
> 3E
>
> Samuel T. Benge  aberrate36.pov
>
http://news.povray.org/povray.text.scene-files/thread/%3C49681241@news.povray.org%3E/?ttop=397431&toff=50
>
> Samuels code uses normals and dispersion, but not an ior different from 1.
>
> and the fourth source uses ior 1.4 and dispersion, but not normals - Tekno
> Frannansa  photo-style short code
>
http://news.povray.org/povray.binaries.images/message/%3C489a283e%40news.povray.org%3E/#%3C489a283e%40news.povray.org
%3
> E
>
> Tek used some more effects in his winning IRTC entry Elements, but again - no
> normals - http://www.irtc.org/ftp/pub/stills/2005-10-31/elements.jpg
>
> So, your trick is imho new.
>
> By the way, thanks for your nice gallery. My personal favourite is "growth", but
> most of the others are very good too. The minimalistic style of your gallery
> reminds me a bit of Margus Ramst`s homepage (
> http://www.hot.ee/margusrt/eng/main.html ).
>
> So, keep on poving...
>
> Norbert Kern

Cool stuff. So many different ways to distort an image. How did you find all
that?
By the way: Your favorite, Growth, uses the very same distortion trick.


Michael Scharrer, https://mscharrer.net

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"Michael Scharrer" <nomail@nomail> wrote:

> Cool stuff. So many different ways to distort an image. How did you find all
> that?
> By the way: Your favorite, Growth, uses the very same distortion trick.


After rendering all of your images at low resolution I made a 16000*9000 render

In between  I examined your source.  Other than Paul Bourke (or Tsutomo Higo)
you published an efficient pov code for random growth (see
http://paulbourke.net/fractals/dla3d/ and
http://www.asahi-net.or.jp/~nj2t-hg/ilpov28e.htm for comparison). Your code


to now I collected much more than 1000 materials (some of them were published
here:
http://news.povray.org/povray.binaries.images/thread/%3Cweb.539f5e021ecc065ca7f881130@news.povray.org%3E/
and
http://news.povray.org/povray.binaries.images/thread/%3Cweb.53b01c9f388faa557ffb57fd0@news.povray.org%3E/
 ).
If I had to guess, your sources will lead to 5 to 10 new materials for my
collection...  ;-)

Norbert Kern

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On 21-8-2015 17:54, Norbert Kern wrote:

> If I had to guess, your sources will lead to 5 to 10 new materials for my
> collection...  ;-)
>

I am sure of that ;-)


-- 
Thomas

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