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You need more light to get rid of the shadows on the helix. With all that
media light gushing out, I'd expect it to be more illuminated.
Not that I'm nocking your work. I think I see where you're heading with it.
But like you said, things to work with.
Dirk
"Paul Jones" <pdj### [at] psu edu> wrote in message
news:38A2A05D.37021D3C@psu.edu...
> I really like media....
>
> This was modeled in Spartan (tm) on a SGI O2 and converted to a *.PDB
> then worked up with POVChem trial version.
>
> I really don't like to "floor", but these are things to work with....
> :-)
>
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Looks like the good ol' original POV-Ray media there, nice and dusty. Could
have rendered it in a fraction of the time using MegaPov and method 2 intervals
4 samples 5,5 and had a dust-free environment too.
It looks very good as is though. I thought maybe it might have been better to
see the light filtering directly through the molecule too, sort of giving it a
more illuminating from within look to it.
Bob
"Paul Jones" <pdj### [at] psuedu> wrote in message news:38A2A05D.37021D3C@psu.edu...
| I really like media....
|
| This was modeled in Spartan (tm) on a SGI O2 and converted to a *.PDB
| then worked up with POVChem trial version.
|
| I really don't like to "floor", but these are things to work with....
| :-)
|
--------------------------------------------------------------------------------
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In article <38a400ed@news.povray.org>, "Bob Hughes"
<per### [at] aolcom?subject=PoV-News:> wrote:
> Looks like the good ol' original POV-Ray media there, nice and dusty.
> Could have rendered it in a fraction of the time using MegaPov and
> method 2 intervals 4 samples 5,5 and had a dust-free environment too.
Actually, it is recommended to keep intervals set to 1 when using
MegaPOV media. Too many will produce odd effects, and more will be
created when necessary. I usually use method 3 intervals 1 samples 15,
15, with the default aa_level and aa_threshold. I sometimes push the
samples higher when more detail is needed, but rarely need to go over 30.
--
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/
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I wonder if I could get credit in biology for rendering some DNA being copied
to mRNA and sent to the ribosomes to make some proteins...
--
___ ______________________________________________________
| \ |_ <dav### [at] faricynet> <ICQ 55354965>
|_/avid |ontaine http://www.faricy.net/~davidf/
"Sitting on a cornflake, waiting for the van to come" -Beatles
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I wouldn't be so sure of the "recommended" intervals of 1. A quick check
using the media1.pov demo file can show there is a difference between using 1
and 4 (one more than the number of media interacting light sources) and a lower
sample setting can be used without compromising the quality I think.
I could get a 5 times faster render using method 3 intervals 4 samples 5,5
than I could with media set to method 3 intervals 1 and samples 15,15. Using
method 2 is even faster still but loses quality, unless the samples are doubled
and then it is actually slower. It should be said that method 2 can't seem to
tolerate a difference in the minimum and maximum samples without getting a
method 1 look to it, which isn't all bad if you wanted speed and dust graininess
also.
Bob
"Chris Huff" <chr### [at] yahoocom> wrote in message
news:chrishuff_99-D77B4D.16150511022000@news.povray.org...
| In article <38a400ed@news.povray.org>, "Bob Hughes"
| <per### [at] aolcom?subject=PoV-News:> wrote:
|
| > Looks like the good ol' original POV-Ray media there, nice and dusty.
| > Could have rendered it in a fraction of the time using MegaPov and
| > method 2 intervals 4 samples 5,5 and had a dust-free environment too.
|
| Actually, it is recommended to keep intervals set to 1 when using
| MegaPOV media. Too many will produce odd effects, and more will be
| created when necessary. I usually use method 3 intervals 1 samples 15,
| 15, with the default aa_level and aa_threshold. I sometimes push the
| samples higher when more detail is needed, but rarely need to go over 30.
|
| --
| Chris Huff
| e-mail: chr### [at] yahoocom
| Web page: http://chrishuff.dhs.org/
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following this thread, is there a good, down to earth explaination of
how the media parameters interact with each other? I find the manual to
be a bit overwhelming in this respect. In other words, what do all the
parameters do in a basic, real world sense?
-paul
Bob Hughes wrote:
>
> I wouldn't be so sure of the "recommended" intervals of 1. A quick check
> using the media1.pov demo file can show there is a difference between using 1
> and 4 (one more than the number of media interacting light sources) and a lower
> sample setting can be used without compromising the quality I think.
> I could get a 5 times faster render using method 3 intervals 4 samples 5,5
> than I could with media set to method 3 intervals 1 and samples 15,15. Using
> method 2 is even faster still but loses quality, unless the samples are doubled
> and then it is actually slower. It should be said that method 2 can't seem to
> tolerate a difference in the minimum and maximum samples without getting a
> method 1 look to it, which isn't all bad if you wanted speed and dust graininess
> also.
>
> Bob
>
> "Chris Huff" <chr### [at] yahoocom> wrote in message
> news:chrishuff_99-D77B4D.16150511022000@news.povray.org...
> | In article <38a400ed@news.povray.org>, "Bob Hughes"
> | <per### [at] aolcom?subject=PoV-News:> wrote:
> |
> | > Looks like the good ol' original POV-Ray media there, nice and dusty.
> | > Could have rendered it in a fraction of the time using MegaPov and
> | > method 2 intervals 4 samples 5,5 and had a dust-free environment too.
> |
> | Actually, it is recommended to keep intervals set to 1 when using
> | MegaPOV media. Too many will produce odd effects, and more will be
> | created when necessary. I usually use method 3 intervals 1 samples 15,
> | 15, with the default aa_level and aa_threshold. I sometimes push the
> | samples higher when more detail is needed, but rarely need to go over 30.
> |
> | --
> | Chris Huff
> | e-mail: chr### [at] yahoocom
> | Web page: http://chrishuff.dhs.org/
--
Paul Daniel Jones
307 Chandlee Laboratory
Penn State Chemistry Dept.
pdj### [at] psuedu
http://glasssgi.chem.psu.edu
(814)-865-2090
C
/ \
N N
| O |
C C
/ \ / \
H3C C CH3
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"Paul Jones" <pdj### [at] psuedu> wrote in message news:38A5CC43.A84636E7@psu.edu...
| following this thread, is there a good, down to earth explaination of
| how the media parameters interact with each other? I find the manual to
| be a bit overwhelming in this respect. In other words, what do all the
| parameters do in a basic, real world sense?
That's something I know nothing about. Mike Hough < hos### [at] aolcom >
did the 'method 2' media so I'm sure he learned plenty about the inner workings
of it. I believe Nathan Kopp has done the 'method 3' so he would also know a
lot.
If you're wondering what 'intervals' is I can only guess it is like a integral
layers for the samples, and the samples of course being very much like the
antialiasing of the image.
But then I shouldn't even conjecture about it.
Bob
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On Sat, 12 Feb 2000 18:02:06 -0600, Bob Hughes wrote:
>If you're wondering what 'intervals' is I can only guess it is like a integral
>layers for the samples, and the samples of course being very much like the
>antialiasing of the image.
"intervals" is the maximum number of chunks POV will break the ray into for
purposes of calculating the color of the media. An interval begins or ends
at the boundary of the area of illumination of a spot or cylinder light.
There's really no reason you should ever have to specify this; POV should be
able to figure it out for itself, and in fact Nathan has made it do so.
"samples" is the minimum and maximum number of sample points in an interval.
POV will sample at least the minimum number of points, and if the variance is
too high will continue sampling until either the variance is low enough or
the number of samples hits the maximum.
--
These are my opinions. I do NOT speak for the POV-Team.
The superpatch: http://www2.fwi.com/~parkerr/superpatch/
My other stuff: http://www2.fwi.com/~parkerr/traces.html
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Ron Parker wrote:
>
> "intervals" is the maximum number of chunks POV will break the ray into for
> purposes of calculating the color of the media. An interval begins or ends
> at the boundary of the area of illumination of a spot or cylinder light.
Actually, in MegaPOV, it's the *minimum* number of chunks
(and in standard POV, it's the exact number). Some intervals
do begin or end at the light boundaries, the others are
evenly spaced.
> There's really no reason you should ever have to specify this; POV should be
> able to figure it out for itself, and in fact Nathan has made it do so.
Right, that's why it's better when set to 1, especially
since iirc method 3 doesn't sample the media near the ends
of the interval (!) and therefore, the more intervals you
have, the less accurate the computations (and the higher the
risk of banding).
>
> "samples" is the minimum and maximum number of sample points in an interval.
> POV will sample at least the minimum number of points, and if the variance is
> too high will continue sampling until either the variance is low enough or
> the number of samples hits the maximum.
>
An additional explanation here:
* in method 1, samples are taken randomly in the interval
until the variance is low enough, or the max has been
reached;
* in method 2, the minimum number of samples are taken
evenly spaced in the interval, then others are taken
randomly like for method 1 (hence the return of the grainy
look when samples max is bigger than min);
* in method 3, the maximum number of samples isn't used.
Samples are first taken evenly spaced like for method 2,
then if two consecutive samples are too different, another
is added in the middle, and so on until they are near enough
or the aa depth has been reached.
Jerome
--
* Doctor Jekyll had something * mailto:ber### [at] inamecom
* to Hyde... * http://www.enst.fr/~jberger
*******************************
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