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twenty-something hours render
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Attachments:
Download 'sav.20019.jpg' (76 KB)
Preview of image 'sav.20019.jpg'
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"Jim Charter" <jrc### [at] msn com> a écrit dans le message de
news:4346b4ca@news.povray.org...
> twenty-something hours render
Sorry can't swim with you, I am salt-forbidden ;-)
Wait! did you model all those fishes? even the big one? didn't it swallow
your mouse?
Great!!!
Marc
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Jim Charter <jrc### [at] msncom> wrote:
> twenty-something hours render
Wow! It's starting to look very good! The flash falloff is much better and
the remora is an excellent touch for realism.
Only things that look funny to me now are the normal on the shark's skin is
too pronounced and the water in the background should also have a light
falloff with depth; the bottom of the picture should be a lot darker than
the top, probably a dark blue-green almost black.
Is the water color media? If so, maybe a gradient background behind it or
maybe even negative lights below and behind.
RG
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Marc Jacquier wrote:
> "Jim Charter" <jrc### [at] msncom> a écrit dans le message de
> news:4346b4ca@news.povray.org...
>
>>twenty-something hours render
>
>
> Sorry can't swim with you, I am salt-forbidden ;-)
Salt-forbidden???
>
> Wait! did you model all those fishes? even the big one? didn't it swallow
> your mouse?
> Great!!!
>
> Marc
>
>
>
Thanks Marc.
The shark is modeled entirely in Wings. So are the remora. The obvious
way to do the fish would have been to model them also in Wings and use
the magnets feature to create and save off a dozen or so swimming
postures then apply them randomly in the fish school. But alas I took
on the challenge of generating the fishies within SDL. They are created
in mesh based on splines all derived from a sort of axial backbone
spline which is bent randomly. A dozen random instances of the fish are
created and stored then instanced randomly. I also calculated the UV's
and generated a crude template for painting the image and bump maps.
There is also a image pattern map used to get the transparency of the
fins. However the model is still to crude to sustain much of a closeup.
Post a reply to this message
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> They are created
> in mesh based on splines all derived from a sort of axial backbone
> spline which is bent randomly. A dozen random instances of the fish are
> created and stored then instanced randomly. I also calculated the UV's
> and generated a crude template for painting the image and bump maps.
Jim I am doing something amazingly similar with fish and splines right
now (although the project is on hold until school breaks). You seem to
have been able to write it much faster than I have though.
The render look fantastic! Your shark could use a bit of wear though.
Most good sized sharks have a few nicks in them. Stunning nonetheless
though.
Skip
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Jim Charter <jrc### [at] msncom> wrote:
> twenty-something hours render
The shark flesh seems always a bit rigid, probably something to tweak
here...
but it's well done Jim.
Jim Charter <jrc### [at] msncom> wrote:
> Marc Jacquier wrote:
> > "Jim Charter" <jrc### [at] msncom> a écrit dans le message de
> > news:4346b4ca@news.povray.org...
> >
> >>twenty-something hours render
> >
> >
> > Sorry can't swim with you, I am salt-forbidden ;-)
>
> Salt-forbidden???
>
salt free diet ? (Marc, are you an hypertensive ??)
René
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"Jim Charter" <jrc### [at] msncom> schreef in bericht
news:4346b4ca@news.povray.org...
> twenty-something hours render
>
Can I go to another swimming pool, please?
Excellent work Jim!
Thomas
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"Rene Bui" <ren### [at] freefr> a écrit dans le message de
news:web.4347a7a7dfbececf6121e2ac0@news.povray.org...
> salt free diet ? (Marc, are you an hypertensive ??)
>
Yes, doomed to flavourless food :-/
Marc
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gonzo wrote:
> Jim Charter <jrc### [at] msncom> wrote:
>
>>twenty-something hours render
>
>
> Wow! It's starting to look very good! The flash falloff is much better and
> the remora is an excellent touch for realism.
Thanks Ron.
>
> Only things that look funny to me now are the normal on the shark's skin is
> too pronounced
I agreed it isn't quite right though I am not quite sure which way to go
with it. Right now it looks like wet seak skin to me. It is a bump map
so I can of course reduce the bumo_size. The texture is created in
Photoshop with custom brushes that I dirived from images of silhouetted
tree branches I believe. Right now the texture in that strange area of
being closer-than-I've-ever-gotten, but still not "right" So I cling to
it. IT's a matter of vision as well as technical I think.
and the water in the background should also have a light
> falloff with depth; the bottom of the picture should be a lot darker than
> the top, probably a dark blue-green almost black.
Yes I was playing with some of those effects back when I was
concentrating on the lighting. It is sort of a matter of balance.
Pictures where you see the media effect have more of an overhead light.
Pictures with the strob light and severe falloff seem to have a
clearer look with less media and debris coloring the water. Those
images have more tactility and visual punch it seems to me but loose the
sense of immersion. I guess I was trying to trade these effects off.
Have it both ways. Another envisioning issue. I will have to revisit it.
>
> Is the water color media? If so, maybe a gradient background behind it or
> maybe even negative lights below and behind.
>
>
I was using the gradient at one point but did want to "model" the
lighting in a cleaner way comceptually if I could. Didn't think of the
negative lights idea
The media is basically this:
sphere {
hollow
pigment {
rgbt <0,0,0,1>
}
finish {
ambient 0
diffuse 0
}
interior {
media {
absorption ...
}
media { //bg color
scattering { .... extinction ... }
density {
granite
scale .1
turbulence 1
color_map { a blend }
}
}
media { //bg color
scattering { .... extinction ... }
density {
granite
scale .5
turbulence 1.5
color_map { a blend }
}
}
media { //large debris
scattering { .... extinction ... }
density {
granite
scale 5.5
turbulence .1
color_map {
stepped with transparent color
to get particles
}
}
}
media { //pea soup
scattering { .... extinction ... }
density {
granite
scale .03125
turbulence .1
color_map {
stepped with transparent color
to get particles
}
}
}
}
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Great Lighting
Very realistic....jaws
Rémy
"Jim Charter" <jrc### [at] msncom> a écrit dans le message de news:
4346b4ca@news.povray.org...
> twenty-something hours render
>
--------------------------------------------------------------------------------
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What is producing the speckles in the water? Distant fish or randomly
distributed particles of some sort?
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Skip Talbot wrote:
> What is producing the speckles in the water? Distant fish or randomly
> distributed particles of some sort?
several "layered" medias with granite densities. You can see a sketch
of the syntax in my reply to gonzo.
the "pea soup" particles were produced by the layer with
precisely this syntax:
media { //pea
scattering {
1,
1
extinction 1.0
}
density {
granite
turbulence 0
scale .03125
color_map {
[0.00 rgb 0]
[0.85 rgb 0]
[0.90 rgb <.004,.006,.002 >*1.4]
[1.00 rgb <.004,.006,.002 >*1.4]
}
}
samples 60, 100
}
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Rene Bui wrote:
> Jim Charter <jrc### [at] msncom> wrote:
>
>>twenty-something hours render
>
>
> The shark flesh seems always a bit rigid, probably something to tweak
> here...
> but it's well done Jim.
>
Thanks, yes the shark is due another pass. Both modelling and texturing.
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Thomas de Groot wrote:
> "Jim Charter" <jrc### [at] msncom> schreef in bericht
> news:4346b4ca@news.povray.org...
>
>>twenty-something hours render
>>
>
> Can I go to another swimming pool, please?
>
> Excellent work Jim!
>
> Thomas
>
>
>
Thanks Thomas. I haven't been commenting but I have been watching the
evolution of your ice scene with interest.
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Remy Closset wrote:
> Great Lighting
> Very realistic....jaws
>
> Rémy
Thanks Remy. This was really my first foray into effects of
media/lighting interactions.
Post a reply to this message
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Skip Talbot wrote:
>
>
> Jim I am doing something amazingly similar with fish and splines right
> now (although the project is on hold until school breaks). You seem to
> have been able to write it much faster than I have though.
>
Fish do seem like a candidate for this. Almost too easy was my first
thought. So I felt a little embarrassed, privately, when usable results
proved elusive at first. Even now there are certain steps in my methods
that make me a bit queasy. It works but I don't totally understand why?
The whole thing took much longer than I had anticipated it would.
And there is some awkward stuff in my design. For instance when I
produce the mesh I proceed along the length of the fish, but when I
generate the UV's I proceed along the breadth. It really requires more
thought and comprehensive design than I put into it.
If I was able to proceed "faster" in your perception it may be because I
have attempted similar things in the past, (a bird), and worked alot
with splines and "grids" of splines with my attempts to produce animal
coverings, feathers, fur, scales etc.
> The render look fantastic! Your shark could use a bit of wear though.
> Most good sized sharks have a few nicks in them. Stunning nonetheless
> though.
>
Thanks.
Yes, as in all mimetic art, it is a matter of refining your observation
of the subject. I wish I had Rene Bui's acute ability that way. In the
home appliance store I work at they have a tape of sharks swimming which
they use to demo the hi-def TV's. I have been learning a lot by
sneaking down to the "Home Entertainment" section of the store and
watching that tape from time to time. You can sense things with the
sharks moving that aren't so apparent in still shots. Sooo. More to come.
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"Jim Charter" <jrc### [at] msncom> schreef in bericht
news:434aa860$1@news.povray.org...
> >
> Thanks Thomas. I haven't been commenting but I have been watching the
> evolution of your ice scene with interest.
Thanks indeed Jim. It started as a little funny game, and it evolved into
serious scene building. Possibly I am going to do a small series of room
scenes based on the same concept.
Thomas
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Jim Charter <jrc### [at] msncom> wrote:
> twenty-something hours render
This is great, the debris and lighting are much better than the previous
post (which was still very good) and the Shark and other fish are
fantastic. I can't actually find anything to fault with this image other
than you need to do a 80 hour render at higher resolution ;-)
Sean
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