Problems with Voronoi 3d Cell Noise

[DJ]

I want to use a Voronoi 3D Cell scalar noise as a base for my terrain.
It works fine but I would like to smooth the sharp edges and remove the artifact-structures on the vertical surfaces.
Any ideas ?

Thx DJ

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[Goms]

Good question! I worked on that for a while but couldn't get a satisfying result.

[buzzzzz1]

Have you tried either of the erosion operators?

[DJ]

Thank you, buzzzzz1.
IT WORKS!
I tried smooth and erode:

smooth:
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erode:
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DJ

[cyphyr]

wow that's pretty impressive, interesting how similar both operators are. These will only work on heightfields yes?
richard

[Goms]

But how do you do it without converting it to a heightfield?
This could be interesting.

[DJ]

You have to convert it to a heightfield, afterwards you re-convert it to a shader:

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DJ

[Mohawk20]

And since you have a fractal noise to base the heightfield on, you can make the heightfield as large as you want without loosing any detail...

[Mr_Lamppost]

Yes you can soften the edges of the Voronoi cells without converting to a height field. 

Not perfect but here's a method I posted last year:

http://www.terragen.org/index.php?topic=4454.msg35238#msg35238