Subject:
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Re: Excellent rendering...
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Newsgroups:
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lugnet.cad.ray
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Date:
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Wed, 18 Sep 2002 18:55:52 GMT
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Viewed:
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1083 times
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"Coby Bassett" <coby@tubafrog.com> skrev i meddelandet
news:H2LqHH.Hzo@lugnet.com...
> Here's a little followup about my experimentation (along with a new • test
> image-> http://tubafrog.com/temp/442update.jpg ).
>
> My festivities have hit a big snag when I tried using transparent • pieces.
> I guess these pieces send the radiosity rays ascattering, creating a
> tremendous load on the system. I have yet to achieve a proper render while
> using radiosity and transparent pieces; I am getting black spots all over,
> even when cranking up max_trace_level to high levels.
Hmm, I've made some tests too, but not seen anything like what you describe.
Veeerrryyy slow to render with radiosity, though, and a bit difficult to get
the colors I want.
http://www.brickshelf.com/gallery/anders-isak/Test/test.jpg
http://www.brickshelf.com/gallery/anders-isak/Test/test1.jpg
http://www.brickshelf.com/gallery/anders-isak/Test/test2.jpg
Absolutely no post-processing done to these (OK, made .jpg of them),
transparent parts in two of them.
Beginning of .pov file:
#declare AMB = 0;
#declare DIF = 0.8;
global_settings {
assumed_gamma 1
ambient_light 0
max_trace_level 25
adc_bailout 1/150
radiosity {
pretrace_start 0.08
pretrace_end 0.01
count 300
error_bound 0.1
recursion_limit 1
}
}
... and at the end:
<remove the light sources>
sky_sphere {
pigment {
gradient -y
color_map {
[0.5 rgb 1.25]
[1 rgb <.5,.7,1>*1.1]
}
}
}
object {
plane { y, 19 hollow }
texture {
pigment { color rgb 1 }
finish { ambient 0 diffuse 1 }
}
translate 500*y
}
// Camera (Latitude,Longitude,Radius = 30,45,0)
camera {
location <-525.469435445558,-342.020153999329,-779.040517801086>
sky -y
right -4/3*x
look_at <-10, -68, -10>
angle 45
rotate <0,1e-5,0> // Prevent gap between adjecent quads
//orthographic
focal_point <150,-50,-150>
aperture 25
blur_samples 70
variance 1/1000
}
(With some variation in gamma value and camera location/angle in the
different pictures)
--
Anders Isaksson, Sweden
BlockCAD: http://user.tninet.se/~hbh828t/proglego.htm
Gallery: http://user.tninet.se/~hbh828t/gallery/index.htm
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Message has 5 Replies:
 | | Re: Excellent rendering...
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| Just to add that I made my pictures with L3P parts. Started a picture with LGEO parts over an hour ago, and it's still only on line 129 of 480. No traces of any black spots yet, though. I don't want to think about doing this rendering with (...) (22 years ago, 19-Sep-02, to lugnet.cad.ray)
| | | Re: Excellent rendering... (need new l3p)
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| (...) Gotta love the radiosity pics! So the big question now is how close is the next release of l3p? You know, the one that supports all this on the command line with -ib -ie -il and -ci as mentioned in this thread. (URL) can't wait. Don (22 years ago, 20-Sep-02, to lugnet.cad.ray)
| | | Re: Excellent rendering...
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| Hi Anders - I'm using this code, with amazing results!! I've tweaked the assumed_gamma and reflection values to get a good LEGO look. One thing I'm still puzzled at is how to get the fuzzy shadow underneath objects? I'm not a POV guru... hope (...) (22 years ago, 25-Jan-03, to lugnet.cad.ray)
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Message is in Reply To:
| | Re: Excellent rendering...
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| Here's a little followup about my experimentation (along with a new test image-> (URL) ). My festivities have hit a big snag when I tried using transparent pieces. I guess these pieces send the radiosity rays ascattering, creating a tremendous load (...) (22 years ago, 17-Sep-02, to lugnet.cad.ray)
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