POV-Ray : Newsgroups : povray.beta-test : Subsurface Light Transport and mesh2 Server Time
18 May 2024 09:52:37 EDT (-0400)
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From: James Holsenback
Subject: Re: Subsurface Light Transport and mesh2
Date: 26 Mar 2012 14:31:32
Message: <4f70b604$1@news.povray.org>
On 03/25/2012 08:37 PM, clipka wrote:
> OK, here's the deal: To avoid SSLT seams between multiple objects, they
> currently must /share/ a common interior - it's not sufficient to have
> interiors with identical parameters, or even instances of the same
> #define'd interior. The only way to achieve this is to specify the
> interior in the parent CSG rather than the individual primitives.
>
> Thus, to get the desired results, you need to:
>
> - REMOVE any interior statements from the material.
> - ADD the interior statement to the union or merge.
> - For each part that needs a different ior (e.g. eyelashes or teeth) add
> an individual interior statement.

Seems to me the above might make an excellent addition to the 
documentation ... whata ya think?


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From: clipka
Subject: Re: Subsurface Light Transport and mesh2
Date: 26 Mar 2012 20:24:18
Message: <4f7108b2$1@news.povray.org>
Am 26.03.2012 20:31, schrieb James Holsenback:
> On 03/25/2012 08:37 PM, clipka wrote:
>> OK, here's the deal: To avoid SSLT seams between multiple objects, they
>> currently must /share/ a common interior - it's not sufficient to have
>> interiors with identical parameters, or even instances of the same
>> #define'd interior. The only way to achieve this is to specify the
>> interior in the parent CSG rather than the individual primitives.
>>
>> Thus, to get the desired results, you need to:
>>
>> - REMOVE any interior statements from the material.
>> - ADD the interior statement to the union or merge.
>> - For each part that needs a different ior (e.g. eyelashes or teeth) add
>> an individual interior statement.
>
> Seems to me the above might make an excellent addition to the
> documentation ... whata ya think?

I expect to lift this limitation some time in the future, but yes - 
until then it's probably a good idea to officially document this 
restriction.


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From: James Holsenback
Subject: Re: Subsurface Light Transport and mesh2
Date: 27 Mar 2012 08:27:25
Message: <4f71b22d$1@news.povray.org>
On 03/26/2012 08:24 PM, clipka wrote:
> Am 26.03.2012 20:31, schrieb James Holsenback:
>> On 03/25/2012 08:37 PM, clipka wrote:
>>> OK, here's the deal: To avoid SSLT seams between multiple objects, they
>>> currently must /share/ a common interior - it's not sufficient to have
>>> interiors with identical parameters, or even instances of the same
>>> #define'd interior. The only way to achieve this is to specify the
>>> interior in the parent CSG rather than the individual primitives.
>>>
>>> Thus, to get the desired results, you need to:
>>>
>>> - REMOVE any interior statements from the material.
>>> - ADD the interior statement to the union or merge.
>>> - For each part that needs a different ior (e.g. eyelashes or teeth) add
>>> an individual interior statement.
>>
>> Seems to me the above might make an excellent addition to the
>> documentation ... whata ya think?
>
> I expect to lift this limitation some time in the future, but yes -
> until then it's probably a good idea to officially document this
> restriction.

done: 
http://wiki.povray.org/content/Reference:Finish#Subsurface_Light_Transport


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