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Okay, I'll play with that
Sigmund Kyrre Aas wrote:
> Yay! Nice! The boat is pretty dark, but I suppose a photo of the real
> thing would look similar with the sun behind like that. I can only
> recommend that you tilt the camera up a bit, so that the horizon is
> about 1/3 up from the bottom.
>
> s
> --
> ICQ 74734588
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Yes, in some of the photos, when the sun was a little higher, (it was sinking
fast that evening), there are what may be caustics on the near side of the
tug, but maybe it was lens flare.
Francois Labreque wrote:
> j charter wrote:
> >
> > The scene also was rendered with radiosity, is the lighting believable?
> >
>
> Not bad. But you need photons and/or caustics.
>
> --
> Francois Labreque | Unfortunately, there's no such thing as a snooze
> flabreque | button on a cat who wants breakfast.
> @ | - Unattributed quote from rec.humor.funny
> videotron.ca
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Christoph Hormann wrote:
> That looks really good, some nitpicking anyway:
>
> - the sun looks fairly dark for such a clear sky.
I agree, the sun is a disc + a glow, maybe I'll try a media object instead.
>
> - the water usually should not be brighter than the sky, in megapov make
> sure you have conserve_energy specified in the finish.
used:
#declare t_water = texture {
pigment {color rgbf <1, 1, 1, 1>}
finish {phong 1 phong_size 90 diffuse 0
ambient 0
conserve_energy
reflection_min .3
reflection_max .7
reflection_falloff 2
}
}
#declare interior_water = interior {
ior 1.33
media {
absorption <.1, .05, .05> samples 2, 2
}
}
>
> - the boat looks nice, but the parts lit by the sun should be brighter
> than the rest, right now it looks totally uniform.
Yes though the only plane that catches the light in the photo is the far
forward edge of the roof overhang on the cabin and one glaring window pane.
Maybe I'll rotate the boat a bit and see if I can pick that up
>
>
> Christoph
>
> --
> Christoph Hormann <chr### [at] gmx de>
> IsoWood include, radiosity tutorial, TransSkin and other
> things on: http://www.schunter.etc.tu-bs.de/~chris/
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HaHa! I am pleased to meet another who shares my affection for L Erie
"D.J. Brown" wrote:
> Very nice indeed. The water needs fixed, though. I live a couple miles from
> Lake Erie and visit quite often. The water, when there aren't waves coming
> from offshore, is almost perfectly flat. When there are waves, they aren't
> small isolated bumps as in this picture. They come in in long, angled,
> ripples - with the water you've created riding on top of them. About 100
> feet off-shore, all along the lake, the water becomes signifigantly darker.
Yes I agree, I really did plan to push the water texture further. Your
description is accurate to my memories of the Lake. The way I did the water
surface was actually an experiment. It consists of bicubic patches, the height
of their control points determined using eval_pigment. The underlying pigment
pattern is basically the noise3d function scaled slightly in the x direction.
The smooth, oily, random pitch that results is reminiscent of the way the water
looks a ways up Black Creek which feeds into Dover Harbour. But down in the
basin, behind the breakwater, it is usually the sort of busy chop over longer
period waves that you describe. That look can be gotten from compounding the
ridgedmf function, as many pictures now have so beautifully demonstrated, but
when I used it with my bicubic patches, they just flattened it out anyway. I
actually can come quite close to the photograph if I scale it down about half
and scale it long in the x axis and short in the z to get what look like
rippling troughs.
>
> Another thing, Lake Eries has TONS of algae growing in it near the shore.
> It's almost like an open netting of algae, with chunks that float to the
> top. Also, contrary to popular beleif, Lake Erie is a pristine blue
> now-a-days; wherever sunlight hits it. The color of the water in this
> picture is a bit too drab to be Lake Erie.
Yes the algae seems to come and go depending on wind/currents I expect, but it
is a defining characteristic of Erie. I am more used to it in late summer or
fall.
The water right around Dover can get quite muddy from the beach being churned up
and from the afore mentioned creek. But the abrupt change from the muddy green
to clear blue is always clearly visible as you look out over the lake from the
rise along main steet at the center of town.
>
>
> Just some thoughts from a "Lake Erie" resident. :)
One of the things I always remember is how cold it is out on that lake, even
when shore temperatures are 90+ degrees
Jim
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Lawrence Winstead wrote:
> Wow, that's beautiful! What's your secret for the sky, including the sun and
> clouds? They just take my breath away...
> -Law
sky_sphere
{
pigment { gradient y
pigment_map { [ 0 Turquoise*3/4 ]
[ .5 Black/2 ]
[ 1 Black/2 ] }}
pigment { gradient y
pigment_map { [ 0 Gold*3/4 filter .25 ]
[ .2 RichBlue/2 filter .6 ]
[ 1 Blue/3 filter .75 ] } }
}
The clouds were produced by a macro I derived from one I found on the newsgroups
here.
Unfurtunately I cannot refind it and cannot remember the author to give credit.
It calls a macro, AddCloud
repeatedly which produces media within a box container combining a spherical and
boxed density. I added emission and absorption values which is how I got the
dramatic illumination of the distance clouds.
The sun combines a glow and a disc
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j charter wrote:
>
> I agree, the sun is a disc + a glow, maybe I'll try a media object instead.
Not necessarily, maybe just try to make the glow stronger or add some
spherical pattern to the sky texture.
> >
> > - the water usually should not be brighter than the sky, in megapov make
> > sure you have conserve_energy specified in the finish.
>
> used:
> [...]
It's probably due to the highlight.
>
> Yes though the only plane that catches the light in the photo is the far
> forward edge of the roof overhang on the cabin and one glaring window pane.
> Maybe I'll rotate the boat a bit and see if I can pick that up
>
I think it should easily pick up some direct light as it is now, maybe
reduce brilliance in the boat's finish.
Christoph
--
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
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