On 14-2-2019 14:13, ingo wrote:
> in news:5c655619$1@news.povray.org Thomas de Groot wrote:
> 
>> not /truly/ karstic
> 
> but it gave inspiration, or at least made me think back many moons when
> trying to create erosion in a df3. The animation of that is gone from the
> server sadly and I don't have it anymore.
> 
> I was thinking, let a gradient pigment with some turbulence define the
> chance of a grain placement (yes/no). This creates lager and smaler rocks
> depending on the gray value. Use a somehowe derived pigment to determine
> the hardness of the stone. Remove voronoi cells from the grid depending on
> the hardness. Can be done with some trickery in assigning the labels to
> the cells I think. May need an awfull big grid for that to get something
> coherent. Will investigate.
> 

Interesting. I m curious to see the results of that cogitation. 
Fascinating to see how inspiration works...

-- 
Thomas

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