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1 Nov 2024 21:20:07 EDT (-0400)
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From: Axel R DuVirage
Subject: fine tuning media (too many shadows...)
Date: 15 Dec 2004 06:00:00
Message: <web.41c018783f331b0b854699050@news.povray.org>
how can i reduce the instance of "repeated shadows" in the media for this
render?  there are 4 spotlights in each of the corners of the xmas box.
binary is hosted at :

http://users.eastlink.ca/~lebla312/noel2004x800.bmp

i can post the pov file later if necessary


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From: Warp
Subject: Re: fine tuning media (too many shadows...)
Date: 15 Dec 2004 06:11:29
Message: <41c01be1@news.povray.org>
Just increase the 'samples' value in your 'media' block.

  Fine-tuning aa_threshold and aa_level might also help (at least to
get a better result with a bit faster render).

-- 
#macro N(D)#if(D>99)cylinder{M()#local D=div(D,104);M().5,2pigment{rgb M()}}
N(D)#end#end#macro M()<mod(D,13)-6mod(div(D,13)8)-3,10>#end blob{
N(11117333955)N(4254934330)N(3900569407)N(7382340)N(3358)N(970)}//  - Warp -


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From: Axel R DuVirage
Subject: Re: fine tuning media (too many shadows...)
Date: 15 Dec 2004 09:20:01
Message: <web.41c047ac7ff329aa854699050@news.povray.org>
thank you very much for the prompt reply.
did you have a chance to peek at the render?

i always thought that `samples` variable would come into play some day.
what are average/useful settings?  do i start with min 10 and max 1000 or
just experiment/tweak until iget the results i need?  i am asking this
since i reaaly should be working and not running renders in my head and
asking silly questions to the community.

"soon he will have a gallery posted somewhere to show you all the fun he's
had with PovRay/Moray"  <~~~~~ optimistic fan



Warp <war### [at] tagpovrayorg> wrote:
> Just increase the 'samples' value in your 'media' block.
>
>   Fine-tuning aa_threshold and aa_level might also help (at least to
> get a better result with a bit faster render).
>
> --
> #macro N(D)#if(D>99)cylinder{M()#local D=div(D,104);M().5,2pigment{rgb M()}}
> N(D)#end#end#macro M()<mod(D,13)-6mod(div(D,13)8)-3,10>#end blob{
> N(11117333955)N(4254934330)N(3900569407)N(7382340)N(3358)N(970)}//  - Warp -


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From: Warp
Subject: Re: fine tuning media (too many shadows...)
Date: 15 Dec 2004 09:37:30
Message: <41c04c2a@news.povray.org>
Axel R DuVirage <axe### [at] hotmailcom> wrote:
> i always thought that `samples` variable would come into play some day.
> what are average/useful settings?  do i start with min 10 and max 1000 or
> just experiment/tweak until iget the results i need?

  Since proper settings depend on almost everything in your scene, getting
good values is usually a question of trying until you find them.
  The default values of media give acceptable results for a wide range of
scenes, but in many cases happens as with your image. In that case you
just need to fine-tune them. Your case seems quite clearly a too low
samples value, so pumping it up should help (of course it will probably
make rendering slower, but there's always a price to pay for more
accuracy).

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -


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From: Axel R DuVirage
Subject: Re: fine tuning media (too many shadows...)
Date: 15 Dec 2004 10:35:00
Message: <web.41c058ba7ff329aa854699050@news.povray.org>
thanks again,

will post results soon.  will post more questions.  will lose sleep.  ;-)



Warp <war### [at] tagpovrayorg> wrote:
> Axel R DuVirage <axe### [at] hotmailcom> wrote:
> > i always thought that `samples` variable would come into play some day.
> > what are average/useful settings?  do i start with min 10 and max 1000 or
> > just experiment/tweak until iget the results i need?
>
>   Since proper settings depend on almost everything in your scene, getting
> good values is usually a question of trying until you find them.
>   The default values of media give acceptable results for a wide range of
> scenes, but in many cases happens as with your image. In that case you
> just need to fine-tune them. Your case seems quite clearly a too low
> samples value, so pumping it up should help (of course it will probably
> make rendering slower, but there's always a price to pay for more
> accuracy).
>
> --
> #macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
> [1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
> -1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -


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