POV-Ray : Newsgroups : povray.pov4.discussion.general : Suggest v4.0 allow negative phong / spectral values. (yuqk) : Re: Suggest v4.0 allow negative phong / spectral values. (yuqk) Server Time
18 Feb 2026 07:45:40 EST (-0500)
  Re: Suggest v4.0 allow negative phong / spectral values. (yuqk)  
From: William F Pokorny
Date: 14 Feb 2026 15:58:42
Message: <6990e202$1@news.povray.org>
On 2/14/26 13:40, Cousin Ricky wrote:
> William F Pokorny <ano### [at] anonymousorg> wrote:
>> An old (~2021) yuqk change for which I could not find a prior newsgroup
>> post 'description', allows negative phong and spectral values.
>>
>> We have always been able to use the finish{} block phong and specular
>> features together for effects in an additive-color way. The yuqk fork
>> allows negative phong/spectral values too. For example:
>>
>> [snip]
> 
> I'm confused.  By "spectral," do you mean "specular"?
> 
>


I do. Thank you. Every day, I'm a step closer day to talking endlessly 
about turnips... :-(

Bill P.


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