I want to create a micro-circle texture design as shown on reference image on a light diffuser, but I have no idea how to achieve this
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$\begingroup$ I think you want to search for "phyllotaxis" $\endgroup$– Markus von BroadyCommented Feb 17 at 15:53
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2 Answers
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You could try something like that:
Create a circle, extude inwards, loopcut:
Select all, press CtrlE > Un-Subdivide and choose an Iterations value of 1:
Press ii and activate Offset Relative:
Move up the new faces:
Give it a Subdivision Surface modifier, rework the topology:
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$\begingroup$ hello buddy @moonboots i try but I'm struggling to achieve the desired result of having all circles within a circular shape be of equal size. Is there a method to ensure uniform circle dimensions $\endgroup$ Commented Feb 17 at 6:56
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We can have this kind of result using a normal map:
A way to make it is to use geometry nodes, starting from the formula indicated here for instance.
The first part of the node tree above, simply implement the indicated algorithm to a set of points.
Then, this second part:
uses a grid with some high resolution and search the proximity of the grid points to the phyllotaxis positions calculated before.
From this proximity distance, it calculates the coordinates for a little sphere around the phyllotaxis point.
Once done, apply the gn modifier, UV unwrap the mesh (project from view, bounds) and bake the normals (with 'object' option gives a better result).
You can after that use the normal map for instance like this:
(Blender 4.0)
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$\begingroup$ @RobinBetts hi and thanks. I've not found any way to model that properly... do you think this is possible respecting wanted proximities? $\endgroup$– lemonCommented Feb 19 at 8:38
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$\begingroup$ Tempted to go and have a look at @Erindale Woodford 's chapters on phyllotaxis .. I can't recall whether there's a route to manifold, glass-shadable topo, there. $\endgroup$– Robin Betts ♦Commented Feb 19 at 10:07