Based off some code I got from these groups, I've made a tornado type cloud
with media, cylindrical pattern and turbulence:

http://www.csh.rit.edu/~topher/mediacloud.jpg

However, as the angle between the cylinder and the camera increases, you can
start to see artifacts. How exactly do I get this to smooth out? Is there a
parameter like number_tests that I can increase to fix this?

Thanks in advance!

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I should probably mention this is using method 3 in POV-Ray 3.5 b14.


"Chris Becker" <cmb### [at] ritedu> wrote in message
news:3c9e8bb2$1@news.povray.org...
> Based off some code I got from these groups, I've made a tornado type
cloud
> with media, cylindrical pattern and turbulence:
>
> http://www.csh.rit.edu/~topher/mediacloud.jpg
>
> However, as the angle between the cylinder and the camera increases, you
can
> start to see artifacts. How exactly do I get this to smooth out? Is there
a
> parameter like number_tests that I can increase to fix this?
>
> Thanks in advance!
>
>

Post a reply to this message

"Chris Becker" <cmb### [at] ritedu> wrote in message
news:3c9e8bb2$1@news.povray.org...
> Based off some code I got from these groups, I've made a tornado type
cloud
> with media, cylindrical pattern and turbulence:
>
> http://www.csh.rit.edu/~topher/mediacloud.jpg
>
> However, as the angle between the cylinder and the camera increases, you
can
> start to see artifacts. How exactly do I get this to smooth out? Is there
a
> parameter like number_tests that I can increase to fix this?

That is interesting, smooth nearer top, degradation nearer bottom.
What were the 'samples' set to? And did you also use 'intervals', 'jitter',
'confidence', 'variance', etc.? Easier still, if you could just post the
media portion of your scene file that would answer all.
But basically, samples should be able to smooth it out. If the script has
intervals set to some small value though that could be the reason for this
happening I believe. v3.5 media method 3 automatically adjusts that if
intervals is left out.
--
sphere_sweep{b_spline 20<-2,-2,4>.1<-2,-1,4>.15<-1.5,1,4>.1<0,0,4>.1
<-2,0,4>.1<0,-1,4>.1<-2.5,-1,4>.1<-.5,-1,4>.1,<0,0,4>.1<1,-.5,4>.1
<0,-1,4>.1<-.5,-.5,4>.1<0,0,4>.1<1,-1,4>.1<1.5,-.25,4>.1<2,0,4>.1
<2,-.75,4>.1<1,-1,4>.1<1.5,1,4>.1<1.5,1,4>.1pigment{rgb 9}}//v3.5

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"samples" was the word I was looking for. I found the page in the
documentation which talks about samples and confidence and variance.

Thanks a bunch!

"bob h" <omn### [at] charternet> wrote in message
news:3c9ecedf@news.povray.org...
> "Chris Becker" <cmb### [at] ritedu> wrote in message
> news:3c9e8bb2$1@news.povray.org...
> > Based off some code I got from these groups, I've made a tornado type
> cloud
> > with media, cylindrical pattern and turbulence:
> >
> > http://www.csh.rit.edu/~topher/mediacloud.jpg
> >
> > However, as the angle between the cylinder and the camera increases, you
> can
> > start to see artifacts. How exactly do I get this to smooth out? Is
there
> a
> > parameter like number_tests that I can increase to fix this?
>
> That is interesting, smooth nearer top, degradation nearer bottom.
> What were the 'samples' set to? And did you also use 'intervals',
'jitter',
> 'confidence', 'variance', etc.? Easier still, if you could just post the
> media portion of your scene file that would answer all.
> But basically, samples should be able to smooth it out. If the script has
> intervals set to some small value though that could be the reason for this
> happening I believe. v3.5 media method 3 automatically adjusts that if
> intervals is left out.
> --
> sphere_sweep{b_spline 20<-2,-2,4>.1<-2,-1,4>.15<-1.5,1,4>.1<0,0,4>.1
> <-2,0,4>.1<0,-1,4>.1<-2.5,-1,4>.1<-.5,-1,4>.1,<0,0,4>.1<1,-.5,4>.1
> <0,-1,4>.1<-.5,-.5,4>.1<0,0,4>.1<1,-1,4>.1<1.5,-.25,4>.1<2,0,4>.1
> <2,-.75,4>.1<1,-1,4>.1<1.5,1,4>.1<1.5,1,4>.1pigment{rgb 9}}//v3.5
>
>
>

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