Author Topic: Distorted Perlin  (Read 4794 times)

Offline The Geostation

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Distorted Perlin
« on: January 12, 2007, 11:50:54 PM »
After quite a bit of fiddling with those dreaded "blue boxes", I've final produced an effect that is close to the Distorted Perlin function I've been hankering for :)

Here's the results (without atmosphere and surface shading etc.)

I hope you like it so far.


Best regards,

Andrew Randle
The Geostation
Andrew Randle
The Geostation

Offline MooseDog

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Re: Distorted Perlin
« Reply #1 on: January 13, 2007, 12:06:21 AM »
excellent ;D

straight blue boxes, or a combination of red and blue?

Offline The Geostation

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Re: Distorted Perlin
« Reply #2 on: January 13, 2007, 12:10:53 AM »
Red & blue  ;)

Andrew Randle
The Geostation
Andrew Randle
The Geostation

Offline Kalala Chan

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Re: Distorted Perlin
« Reply #3 on: January 13, 2007, 11:39:42 AM »
It's looking good thus far  :)
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Offline Oshyan

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Re: Distorted Perlin
« Reply #4 on: January 17, 2007, 08:41:24 PM »
This definitely deserves an example file. :D

- Oshyan

Offline Will

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Re: Distorted Perlin
« Reply #5 on: January 17, 2007, 10:42:54 PM »
Yea Geostation you know you want to ;)

Regards,

Will
The world is round... so you have to use spherical projection.

Offline The Geostation

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Re: Distorted Perlin
« Reply #6 on: January 18, 2007, 09:59:10 AM »
This definitely deserves an example file. :D

- Oshyan

I'll show you mine if you show me yours  ;)

OK, here are my tips (and I'm not going to bypass your fun by giving the tgd away  :P).   I knew what I wanted, I was looking for the distorted perlin function as developed as a macro for World Machine.   So I had a look into the nodal network for the macro in WM and found that the function is essentially a perlin going into a clamping function going into another perlin.   Into this lot goes the Get Position functional block.   Part of the fun is getting the seed and scale right on both perlin functions.

Finally, the TG2TP perlin is not as tweakable as the World Machine perlin so I had to do some jiggery-pokery with the output - basically after converting the scalar to a vector (to convert the numbers into the right format for the terrain) use the redirect shader, but with a very special feed-forward recipe from the Get Position (BTW I don't recommend feedback and the infinite loops it presents, TG2 should have a warning box that says "do you really want to do this?" - even the best of us probably kicks ourselves when this happens).   This lot then gets fed into the landscape power fractal.

There may have been a bit more to it, but I don't have the tgd in front of me as I am currently at work.

I hope this is enough to set you off on another direction of TG Adventure :)   Looking forward to seeing your results.

Andrew Randle
The Geostation
« Last Edit: January 18, 2007, 10:12:23 AM by The Geostation »
Andrew Randle
The Geostation

Online bobbystahr

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Re: Distorted Perlin
« Reply #7 on: July 09, 2017, 12:20:12 PM »
too bad no .tgd. A lot of the fun in Terragen is going through someone's work and learning from what they did that you don't currently grok in an effort to learn more. Guess it was different in  these primitive daze of the program.
something borrowed,
something Blue.
Ring out the Old.
Bring in the New

bobbystahr

 

anything