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I'm quite new to blender and i've been trying to recreate this DNA using only geometry nodes: enter image description here

The problem is that i still didn't figure out how to make the straight forms in the middle match the curve of the double helix enter image description here

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2 Answers 2

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Locate the Instance on Points node responsible for spawning the bridges, and adjust the rotation of the instances. Based on my knowledge of DNA, I think you want to rotate those instances around $z$ axis, aligning them to the offset from the $z$ axis, so the $xy$ offset - that's why I multiply the Position by $<1, 1, 0>$ vector, to remove the $z$ component of the vector:

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you can connect two curves like this:

enter image description here

hope it helps.

There must be an easier way, but my head isn't working today :(

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