Op 22/10/2019 om 11:20 schreef William F Pokorny:
> An attempt a semi-arid ground cover using three isosurfaces and 
> turbulence enabled via the raw_wave keyword discussed in this thread:
> 
>
http://news.povray.org/povray.beta-test.binaries/thread/%3C5daec47c%241%40news.povray.org%3E/

> 

this goes way beyond my understanding but I appreciate the work 
undertaken here.

> 
> Not sure how good it looks, but it's relatively quick to create. A 
> 1200x750 with AA render took 16 minutes on my two core i3. Posting 
> smaller jpg as the detail makes for large image files.
> 

One could interpret it both as a landscape, or as a rugged texture for a 
rocky surface I guess. Interesting stuff.

> The trick is one I've posted before. It uses violent turbulence along 
> with purposely setting the isosurface gradient relatively low to get 
> fuzzy - even cloud-ish like 'stuff.' The isosurface gradient becomes a 
> knob for controlling the fuzzy 'density.' No AA much faster, but it's 
> the AA that makes hard and fuzzy; soft and fuzzy. ;-)
> 
> Previously method based on my df3 patch as I didn't have 'raw_wave', but 
> for this one the base shape just a thin z plane sheet. Oh yeah, not all 
> that apparent, but the sheet also displaced with the fixed radial 
> pattern using a sine_wave modifier - the ground isn't flat.
> 

This calls for getting dirty hands! ;-)

Code available?

-- 
Thomas

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