POV-Ray : Newsgroups : povray.documentation.inbuilt : Re: [solved] "mandel" as function in isosurface has unexpected results Server Time
4 Feb 2023 23:21:02 EST (-0500)
  Re: [solved] "mandel" as function in isosurface has unexpected results (Message 1 to 1 of 1)  
From: Cousin Ricky
Subject: Re: [solved] "mandel" as function in isosurface has unexpected results
Date: 16 Dec 2022 17:53:13
Message: <639cf6d9$1@news.povray.org>
On 2022-12-16 03:27 (-4), Lars Rohwedder wrote:
> 
> https://www.povray.org/documentation/view/3.6.1/377/
> 
> See the explanations for "interior" and "exterior" types 0 and 1.
> A default color map is not mentioned there at all, hence I did not know
> about that. :-/
> 
> 
>>> So I had expected that a formula like 0.9 - mandel would give the
>>
>>> What went wrong here?
>>
Bald Eagle wrote:
>> Part of what's going wrong is that mandel is a POV-Ray pattern that
>> has a built in color map.   And that wreaks hell with everything
>> right from the beginning.
> 
> I see. It should be mentioned in the documentation of the mandel
> pattern. :-/
> 
>> I'd say try using:
>>
>> #declare Mandel = function { pigment {mandel 1000 exterior 1, 1
>> color_map {[0 rgb 0] [1 rgb 1]}}}
>>
>> But you're having more success than I am.
> 
> Thank you a lot! Changing the color map into a stupid black-to-white
> ramp solves the problem.

Forwarding to the documentation newsgroup.


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