Wild Strata - Function

Started by Volker Harun, July 24, 2007, 10:00:12 am

Previous topic - Next topic

Volker Harun

Hi,

attached are a node-screenshot, a scene file and its render. You see some weird strata - could be that I missed something on the 'outcrops'-shader, but I like this one better  ;)

The screenshot shows the Group 'Wild Strata'.
I'll start explaining at the bottom. It is the least important part - I used it only during developing the texture on a sphere.

  • Strata Output gives no colour information, it just recieves some minor displacements from the Colour+Displ.-Shader. The terrain gets some variation.

  • The same variation goes into the colour-function of the Colour-Layer above. This Shader is very unimportant

  • The Strata-Shader above is the one that gets the strata's displacement. Its blending shader sets it to be prominent only where displacement is. In other means colour here the displaced strata - or use the output of the Multiply scalar 02 for blending another colour shader.

  • In the above function-nodes, the strata and its variations are calculated.

  • The one that is called Height Variation should be tuned by 2 values only. The feature scale and the low colour. By setting the feature scale to a lower value, you should make the low colour brighter. Settings now are FS: 100, LC: 0.3125 - other possible settings are FS: 5, LC: 0.875 resulting in very small variations in height.

  • The PF called Depth Variation gives some variation to the displacement amplitude which was calculated by the sin.

  • Have fun ,)



Volker

Volker Harun

I forgot some points:
For increasing the overall step-size, you might want to decrease the high colour in the Height Variation PF. Remember to tune with a higher colour contrast.

Volker

rcallicotte

Geez.  This is awesome.  <hurrying to download>
So this is Disney World.  Can we live here?

Volker Harun

Well, thanks - but I found a mistake.
I was fixed to one height, when creating it - and the function seems to be very height-sensitive in therms of the variations.
The higher, the more variation.

Wait with the download, I am going for new and improved version.

Volker

Volker Harun

Now it is up to you - us.
Attached is a new clipfile which places the strata - in a better way ,-)

I have a constant vector, that is set for the step-size and could be tweaked with a fractal :)

old_blaggard

Very clever and generous, Volker!  Thank you very much!
http://www.terragen.org - A great Terragen resource with models, contests, galleries, and forums.

Volker Harun

And attached is the Version 2.1 ,-)

If you need explanation, ask. I am a bit short in time right now  :D

ProjectX

You are an amazing texturer.

rcallicotte

This is quite plenty and I'll probably be asking questions later today, no matter what.

Thanks Volker. 
So this is Disney World.  Can we live here?

Volker Harun

July 24, 2007, 11:49:52 am #9 Last Edit: July 24, 2007, 11:53:21 am by Volker Harun
@ProjectX - thanks - you might see a Convert / Luminance to Scalar.
This might be the one you have been searching for when you made your procedural canyons - just replace that get altitude with it and activate the colours in the second fractal terrain ,-)

Volker

Edit attached is the last version's render with moderated settings.

ProjectX

Excellent! Just what i was looking for

Volker Harun

For those who do not know, what a 'wild strata' would be good for, a preview render of a scene I am working on.
I set the strata's colour to that golden brown for better visual control. It'll be less prominent in the final render, but.

old_blaggard

Very cool displacements, Volker :).
http://www.terragen.org - A great Terragen resource with models, contests, galleries, and forums.

Volker Harun

Thanks old boy. ,-)
Here is a larger scale version:

rcallicotte

Thanks.  This is very realistic.
So this is Disney World.  Can we live here?