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About Digital Art / Professional Jonathan PearceMale/Australia Recent Activity
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Random007
Jonathan Pearce
Artist | Professional | Digital Art
Australia
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The terrain in Icelandic Fissures and the rock arch in Further Down the Coast use Voronoi patterns to mimic cracks far more realistically than Vue's built-in crack patterns (eg Sparse Cracks).

To experiment with this you need a version of Vue that gives you access to the Function Editor (eg any version above Esprit... or Pioneer + the appropriate upgrade package).


Recipe:

Take a Simple Fractal and change the Noise Type from default Perlin to Cellular -> Voronoi (not Voronoi Altitude or Generalised).

Edit the noise parameters and set Profile to "Spike" and Neighbour to one of the "x - y" types. "1st - 2nd" produces cracks less busy and complex than "3rd - 4th" with "2nd - 3rd" in-between.

Add an Opposite filter to the output.

Add a Smooth Clip filter to that and edit the Brightness and Contrast parameters (with the Function Node Preview window open so you can see what you're doing) such that just fissures show through the clipping threshold in V shapes. Brightness and Contrast should be used to change the shape of the cracks from sudden and sharp to ones with soft, complex round edges and, with low contrast and brightness, the bulbous lumpy overall shape normally associated with Voronoi patterns.

If your feeling crazy, add a Filter filter and apply an interesting curve to the crack.  

As cracks generally subtract from a level surface, set the Upper Clip of the Smooth Clip filter to 0 instead of 1, then you can Combine/Add Voronoi cracks into any function without the overall height of the output changing.

In the Simple Fractal node, experiment with Metascale, Roughness and the Largest Feature parameters (usually above 10) to get the frequency and roughness of cracks desired (bit of hit and miss there). Ticking the Rotation box generally produces spikier looking cracks.

Experiment and enjoy!


EDIT: improved neighbour type description and a few other things.
  • Listening to: IamX
  • Reading: Bill Bryson
  • Watching: This screen
  • Playing: Assassins Creed
  • Eating: Almonds
  • Drinking: Coffee

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:iconpaul-henshaw:
Paul-Henshaw Featured By Owner Nov 26, 2016
Many thanks for the fave's and the watch.
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:iconfirefysh1140:
firefysh1140 Featured By Owner Nov 25, 2016
Hi, Jonathan.
Thanks very much for the "Watch" and the favourites.
You have some lovely work here. :-)
Reply
:iconpanthera1985:
Panthera1985 Featured By Owner Jun 22, 2015  Hobbyist General Artist
Thanks for the fave! :squee:
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:iconhatshj:
Hatshj Featured By Owner Jun 22, 2015  Hobbyist General Artist
Hi.
Nice to meet you here on DA =)
You've a imprssing gallery :thumbsup:
Thanks for the :+fav:
Have a very nice day :sun:
Reply
:iconafterdeath:
AfterDeath Featured By Owner Jun 28, 2013  Hobbyist Digital Artist
Wow thanks so much for all the faves. I really am humbled
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:iconrandom007:
Random007 Featured By Owner Jun 29, 2013  Professional Digital Artist
You're welcome. Great work!
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:iconkuzy62:
kuzy62 Featured By Owner Jun 28, 2013  Hobbyist Digital Artist
:iconthankuplz:
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:iconrandom007:
Random007 Featured By Owner Jun 29, 2013  Professional Digital Artist
:D
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:iconplavidemon:
PlaviDemon Featured By Owner Jun 28, 2013  Professional Digital Artist
Thanks for fave and Watch me if you love 3D :D
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:iconrandom007:
Random007 Featured By Owner Jun 29, 2013  Professional Digital Artist
:thumbsup:
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