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I have already created a kelvin cell but with square struts as shown in the first picture. How do I turn the square struts into cylindrical like the second picture? enter image description here enter image description here

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2 Answers 2

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Add Skin modifier, switch to Edit mode and with all vertices selected adjust Vertices Data > Mean Radius X, Y to something smaller, here 0.02 (3DView > Sidepanel > Item) ...

enter image description here

Add Subdivision modifier > Catmull-Clark, Displace modifier > Strength 0.05

enter image description here

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    $\begingroup$ ..and to get your basic shape use the built-in Mesh: Extra Objects addon and Add > Mesh > Math Function > Regular Solid. Then on the bottom-left Operator menu select "Truncated Octahedron" from the bottom Preset popup menu. Now go into Edit mode and use the Mesh > Cleanup > Limited Dissolve menu to get rid of the extra edges. $\endgroup$
    – John Eason
    Commented Feb 1 at 0:27
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    $\begingroup$ .. or an octahedron with all its vertices bevelled by 33.33% $\endgroup$
    – Robin Betts
    Commented Feb 1 at 6:30
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    $\begingroup$ I was not able to reproduce you settings before you indicated mean radius for skin... but your answer is better! +1 $\endgroup$
    – lemon
    Commented Feb 1 at 9:17
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    $\begingroup$ Or, to add to the comment from @RobinBetts as an alternative, when you have the built-in addon Add Mesh: Geodesic Domes enabled, you can Add > Mesh > Geodesic Dome and choose Class: Class 1, Hedron: Octahedron with Shape: hex and you will also get the desired object. $\endgroup$ Commented Feb 1 at 13:29
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    $\begingroup$ @vklidu but the geometry/topology you've generated is very good (better the 'mine') $\endgroup$
    – lemon
    Commented Feb 1 at 14:54
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Using geometry nodes, you can place a sphere at each summit and bevel the edges with a curve circle.

Junctions won't be visible when rendered.

enter image description here


A 3.5 version: should not make a difference except for the shade smooth node.

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  • $\begingroup$ +1 :) Great ... I wanted to try this too, but I was skeptic about junctions ... very nice result. $\endgroup$
    – vklidu
    Commented Feb 1 at 9:09
  • $\begingroup$ When I tried your method I could not get the desired object. Also, when I create the "Set shade smooth" option It doesn't give me the option to choose from edge or geometry. $\endgroup$ Commented Feb 1 at 13:35
  • $\begingroup$ What is your Blender version? $\endgroup$
    – lemon
    Commented Feb 1 at 13:39
  • $\begingroup$ Version: Blender 3.6 $\endgroup$ Commented Feb 9 at 12:02
  • $\begingroup$ The file I have uploaded is a 3.5 version and it works. $\endgroup$
    – lemon
    Commented Feb 9 at 12:15

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