Inspired by Rune's pigment tricks, I tried some ice swimming on water.  

The scene contains 2 heightfields, the mountains are RMF, the ice is made with
Rune's code slightly modified.  

Comments welcome, I am not content with the textures, anyone who has experience
with icy materials ? 

Christoph

--
Christoph Hormann <chr### [at] gmxde>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/

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"Christoph Hormann" wrote:
> Inspired by Rune's pigment tricks, I tried some ice swimming on water.
>
> The scene contains 2 heightfields, the mountains are RMF, the ice is made
with
> Rune's code slightly modified.

I love it! It's a great example of the possibilities with that pattern
control trick, and it's also a great image in general!

I can't think of any way to improve the ice and the mountains, but the water
could need some more work.

A penguin or another animal could be the final touch.

Greetings,

Rune
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In article <397B6FAA.67A47BBF@schunter.etc.tu-bs.de>, 
chr### [at] gmxde wrote:

> Comments welcome, I am not content with the textures, anyone who has 
> experience with icy materials ? 

Well, for one thing, the water is far too reflective...it should be 
darker, with larger waves, the current waves look far too small and the 
color shouldn't be so blue. You need more lighting on the shaded sides 
of the snow, the colors of snow and ice seem to be highly affected by 
the surroundings in my experience. Radiosity could help here, and maybe 
some fill lights.

As for the ice...it would help if it were a bit translucent. Currently, 
it just doesn't have any depth...it looks like painted blocks of foam. 
The only way I can think of to help this would be to mess with partly 
transparent textures and media...translucency is not easy to do. Also, 
you have some very narrow spikes of ice which would certainly tip over 
in real life, and you need more debris, small bits of ice and slush in 
the water.
Still, it is a very good start...I like the shore. This certainly has 
some potential for an interesting scene.

Maybe a viewpoint closer to one of the ice floes, with footprints across 
the top of the floe, or a hat and glove sitting on top. :-)

-- 
Christopher James Huff - Personal e-mail: chr### [at] maccom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
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OK, admit it, you just got back from a trip to Alaska and want to show
off your photos. Actualy, the hills in the background are fantastic. The
water color is way off from what I've seen from photos of the Artic.
Probubly should be grey in color. Other than that, great work!

Ken Matassa

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And i second that...

Chriss Huff Wrote:

Also, you have some very narrow spikes of ice which would certainly tip
over
in real life, and you need more debris, small bits of ice and slush in
the water.

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A polar bear... =)

Rune wrote:

> A penguin or another animal could be the final touch.
>
> Greetings,
>
> Rune
> --
> Updated July 23: http://rsj.mobilixnet.dk
> 3D images, include files, stereograms, tutorials,
> The POV Desktop Theme, The POV-Ray Logo Contest,
> music, 350+ raytracing jokes, and much more!

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With a Coca Cola Bottle..,

Moon47 wrote:

> A polar bear... =)
>
> Rune wrote:
>
> > A penguin or another animal could be the final touch.
> >
> > Greetings,
> >
> > Rune
> > --
> > Updated July 23: http://rsj.mobilixnet.dk
> > 3D images, include files, stereograms, tutorials,
> > The POV Desktop Theme, The POV-Ray Logo Contest,
> > music, 350+ raytracing jokes, and much more!

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Ok, that just looks good (the mountains).  How did you do those?  I love
how the snow sort matches the hillside and has texture.

Yann
Christoph Hormann wrote:
> 
> Inspired by Rune's pigment tricks, I tried some ice swimming on water.
> 
> The scene contains 2 heightfields, the mountains are RMF, the ice is made with
> Rune's code slightly modified.
> 
> Comments welcome, I am not content with the textures, anyone who has experience
> with icy materials ?
> 
> Christoph
> 
> --
> Christoph Hormann <chr### [at] gmxde>
> Homepage: http://www.schunter.etc.tu-bs.de/~chris/
> 
>   ------------------------------------------------------------------------
>  [Image]

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Moon47 wrote:
> 
> With a Coca Cola Bottle..,
> 
> Moon47 wrote:
> 
> > A polar bear... =)
> >
> > Rune wrote:
> >
> > > A penguin or another animal could be the final touch.
> > >
> > > Greetings,
> > >
> > > Rune

Thanks to both Rune And Moon47, i will think about an animal, even though i
never modelled something like that and i hate using other peoples' models :-)

Christoph

--
Christoph Hormann <chr### [at] gmxde>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/

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Chris Huff wrote:
> 
> Well, for one thing, the water is far too reflective...it should be
> darker, with larger waves, the current waves look far too small and the
> color shouldn't be so blue. You need more lighting on the shaded sides
> of the snow, the colors of snow and ice seem to be highly affected by
> the surroundings in my experience. Radiosity could help here, and maybe
> some fill lights.

The water is just taken from what i had, I agree about your points on that. 
Radiosity is not my strong side :-) There is already one fill light in the
scene.

> 
> As for the ice...it would help if it were a bit translucent. Currently,
> it just doesn't have any depth...it looks like painted blocks of foam.
> The only way I can think of to help this would be to mess with partly
> transparent textures and media...translucency is not easy to do. 

Yeah, i already thought about media, thats probably the only way to get the
milky translucency of ice.  

> Also,
> you have some very narrow spikes of ice which would certainly tip over
> in real life, and you need more debris, small bits of ice and slush in
> the water.

That's the problem with the crackle-texture, I not yet have any idea how to
solve that (maybe I have to remove them by hand :-( )

> Still, it is a very good start...I like the shore. This certainly has
> some potential for an interesting scene.

thanks, in fact, it is done very quickly, i was surprised that it looked quite
well.  

> 
> Maybe a viewpoint closer to one of the ice floes, with footprints across
> the top of the floe, or a hat and glove sitting on top. :-)
> 

Right now, i use a heightfield, so that would be a problem, maybe i should
change it to an isosurface, but that would no more allow manual changes.

Christoph

--
Christoph Hormann <chr### [at] gmxde>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/

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