POV-Ray : Newsgroups : povray.pov4.discussion.general : Suggest v4.0 keep enhanced marble pattern. (yuqk R17 v0.6.11.0) : Suggest v4.0 keep enhanced marble pattern. (yuqk R17 v0.6.11.0) Server Time
10 Dec 2024 05:53:37 EST (-0500)
  Suggest v4.0 keep enhanced marble pattern. (yuqk R17 v0.6.11.0)  
From: William F Pokorny
Date: 14 Nov 2024 08:40:52
Message: <6735fde4@news.povray.org>
I debated for a long while on whether to keep the marble pattern in yuqk 
given the base pattern is just 'gradient x' with a 'triangle_wave' value 
modifier.

For the record I suppose. I decided, given the new to yuqk internal 
turbulence (_it) keyword support, it was worthwhile to keep around. Many 
of us use marble too in old scenes as quick texturing.

In the attached image the basic pattern in the upper left.

In the upper right adding 'it_frequency 1/3'

In the lower left adding 'it_frequency 1/3' and 'it_scale 3'

In the lower right adding 'it_frequency 1/3' and 'it_scale 1/3'

---

Note! I missed adding the it_scale support to 'marble', 'spiral1' and 
'spiral2' when the general scaling capability was added to the internal 
Turbulence() code. The 'it_scale' above is a parse error with marble 
until the next yuqk release (R17).

Reminder. The patterns 'agate', 'marble','spiral1', 'spiral2' and 'wood' 
are touched by the (noise centering drift on omega values) issue fixed 
now a long while ago in the yuqk fork.

Bill P.


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