Op 12-7-2021 om 13:23 schreef Bald Eagle:
> clipka <ano### [at] anonymousorg> wrote:
> 
>>> Which makes me think of that other 3.8 feature you mentioned earlier
>>> about keeping declarations between renders (circumventing #undef)?
>>
>> There's no such official v3.8 feature.
> 
> I *think* what he was referencing was this:
> 
> http://news.povray.org/web.60b43edf388d0b7a1f9dae3025979125%40news.povray.org
> 
> Not identifier values that persist between _renders_ but between sequential
> invocations of the texture-defining macro in the same scene.
> 

"optional" that is the one.

-- 
Thomas

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