Cracked Face

cbalaskas · April 22, 2007, 01:08:41 PM

This setup uses two displaced voronoi noises to generate a fractured rockface look. The more rough your terrain is, the more excessive the features are. Just messing around with things.

RealUser · April 22, 2007, 02:10:05 PM

Very good effect!

rcallicotte · April 22, 2007, 04:48:37 PM

Wow. This is cool. Thanks for the TGD. Very realistic.

cbalaskas · April 22, 2007, 06:07:41 PM

Thanks, and glad you enjoy. Here's the file again with a few tweaks.

cbalaskas · April 22, 2007, 06:12:48 PM

By squishing the voronoi noise on the Y axis (or stretching the X and Z axes), a layered rock look is acheived.

ProjectX · April 23, 2007, 03:46:25 AM

you, sir, are a genius!

cbalaskas · April 23, 2007, 12:59:35 PM

Project X: Ha! Tell that to my girlfriend! Thanks though, I need all the narcissistic supply I can get my hands on

Here's the exact same terrain and setup with a strata and outcrops shader applied (default settings). I'm going to see what a breakup shader does now. Will post results.

moodflow · April 23, 2007, 05:09:55 PM

Very nice work! Many thanks for posting this.

old_blaggard · April 24, 2007, 12:53:46 PM

Great image! That's some pretty awesome detail, as well as an intriguing use of Voronoi.

glen5700 · April 25, 2007, 02:46:25 PM

Nice job on the cracked rocks using voronoi and thanks for sharing. I tweaked it a bit and came up with this....

Glen

rcallicotte · April 25, 2007, 06:08:25 PM

Cool. Reminds me of Mars a bit.

cbalaskas · April 25, 2007, 06:41:34 PM

glenn5700: Hey, that's pretty cool. It tends to look best at lower slopes as it breaks up into smaller outcrops of rock. I used a 2D Tree card setup population and rendered this. Can't see the "cracked face" much though. I wish I could figure ot a way to make the voronoi noise pattern larger with an increase in altitude. Any ideas?

glen5700 · April 25, 2007, 10:19:48 PM

I glad you guy's like my quick Mars scene, thanks.

cbalaskas,
The only thing that came to mind at the moment is you can feed the voronoi through a surface layer node and use the altitude constraints and the fuzzy zone to blend them. Just a thought, nice looking scene you have there and adding the cracks would make it more interesting.

Glen

ProjectX · April 27, 2007, 02:45:02 AM

Quote from: cbalaskas on April 25, 2007, 06:41:34 PM
glenn5700: Hey, that's pretty cool. It tends to look best at lower slopes as it breaks up into smaller outcrops of rock. I used a 2D Tree card setup population and rendered this. Can't see the "cracked face" much though. I wish I could figure ot a way to make the voronoi noise pattern larger with an increase in altitude. Any ideas?

have a get altitude shader.

plug it into a Y to scalar function, and plug that into a multiply scalar.

Into the multiply scalar add a constant scalar and set it to a number.

Add another multiplier, plug the voronoi scalar into this multiplier and the first multiplier into the other end.

Hey presto, the voronoi gets bigger as altitude increases - you just need to tweak the first constant.

You might also want to increase displacement amplitude with altitude, but I don't know that one, sorry.

This is, by the way, done from my head without a single look at the clip file, so it might be wrong.

cbalaskas · April 27, 2007, 08:54:56 PM

Project X: Hmm, I tried as you suggested and wound up with a black low altitude and white high altitude, but no change in scale. Not sure if I did it right though. I tried something else and came up with this wierdness. Not what I'm after, but interesting. tgd attached.

Power fractal terrain, displacement 3000, displ. offset 1500.