Arid crack

[diana.daoud (DD)]

Does anyone know the best way to model a crack similar to the ones in arid landscapes?

[laurent_delrieu]

There are some discussion here

brep cracking

has anyone tried this ceramic crackling pattern in grasshopper

Mesh clustering

[ba8688d3781e6455757789ec70ab5d8f16804698_2_1000x1000] Following the question of Gijs here a short explanation of my mesh clustering. A shape (disk here) is first triangulated with mesh machine, [image] Some random lines are draw on the shape [image] Points on lines are used to get index of mesh faces that are closes to the points. These index in a Datatree are then used as the seed to cluster the mesh [image] Contour of the cluster mesh is extracted as a polyline [image] Polyline …

[diana.daoud (DD)]

but none of these are really representing a crack but rather just a plain pattern. I want something that actually turns into pieces almost crumbles.

[laurent_delrieu]

Did you test this I added recently ?

Mesh clustering

Cracking [image] [image] [image] [image] Here the script to transform some subdivided parts to a sort of cracked mud. The idea is to move the mesh differently if points are near the center of the exterior. The other trick is to connect the borders. Slider controlling the movement must be tuned to the size of the object. You will need Weavebird plugin. I used here classical Voronoi, but you could use mesh clustering and other thessellation algorithms. [image] cracking_forum.gh (18.5 KB) …

And it would be better you provide the input you want mesh nurbs… And the output 3d print CNC …

[John_Brock]

@diana.daoud

Keep in mind that Rhino is intended to accurately model surfaces for manufacturing. I can’t see a situation where making a model that looked like the dry, cracked mud makes sense from a manufacturing point of view.

If this is for visualization purposes, the options outlined by others should be pretty good.
If you really need a model like that, I don’t think a NURBS based surface modeler is the best tool for the job. Potentially a mesh modeler would be a better fit.

How do you plan to use the model?
What is the problem you’re trying to solve?

[Bruce_H]

For me this would be interesting, to model this bowl so I could replicate it with a cnc machine.

[encephalon]

just use a texture and throw it into displacement. then use ExtractRenderMesh

[ftzuk]

Find a graphic of cracks, trace image, project curves to object, cnc? Could also use an image and displacement to create it.

Displacement in Rhino 7