Mick Hazelgrove wrote:
> 
> I've been trying to replicate the rock towers in the winning entry of the
> spectacular landscapes round of the IRTC using isosurfaces. I've only had
> limited sucess though.

I have made a quick test - this is far from being comparable to the
original but i think it shows it is not impossible (although in this
particular case a mesh based approach could be easier).

The pattern used for the cracks is:

crackle
metric 1
form <0.8,0,0>


Christoph

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