Blender Newbie here.

I looked for a way to model an aperture lens and found this question: How do I rig each blade to fan out like an aperture lens?

The questions has been answered very well (Thanks Carlo) but when I try to redo this in Blender 2.8 I'm stuck at the following point (yes, right in the beginning).

I have created a triangle and a circle. The triangle is child of the circle. I activated Instancing on Verts because this is from what I understood the new "duplivert". But, there is not "rotation" setting in Instancing and I have no idea how to rotate the instanced triangles so that they are pointing to the center.

enter image description here

Or is there a better way to achieve this?

I tried the array modifier but this need the Pivot Point to be in the center (and I need it elsewhere for the copy rotation constraint afterwards)

I tried spinning but this does not work at all for flat objects like a plane.

I really tried to find a solution for a few hours now and you are my last hope. :)

Thanks in advance for any hint.


Once I try to use Align to Vertex Normal it's getting out of hands. :)

Is there a way to adjust the vertex normal or what am I doing wrong?

enter image description here enter image description here


It's still there, just the name is changed :).
Now it's called Align to Vertex Normal

enter image description here

When setting up the constraint, change Mix to Add.
Otherwise the triangles won't line up later.

enter image description here

You can add the constraint to other objects using Object > Constraint > Copy Constraints. Just make sure, the constraint isn't on the circle itself :).

enter image description here

  • $\begingroup$ Thank you so much. This has a strange effect for me that you can see in the edited post. Unfortunately I have no clue how to adjust the Vertex normals. I already tried this but gave up when it ended like that... $\endgroup$ – DerFerox Mar 25 '20 at 20:43
  • $\begingroup$ Hello :). You can solve this by applying transforms on your triangle (Object > Apply > All transforms) and also moving the origin point to the shortest side (Object > Set Origin > Origin to 3D cursor). $\endgroup$ – Jachym Michal Mar 25 '20 at 21:19
  • $\begingroup$ Hi there, thanks again. That really worked. I had some problems shifting the Origin around and now it looks pretty good. But there is one more thing: When I Apply > Make Instances Real the Object Constraint (Copy Rotation) is lost. and only the original Triangle can be rotated. I also cannot see the original triangle in your screencapture, did you just hide it? How do I keep the constraints? $\endgroup$ – DerFerox Mar 26 '20 at 10:07
  • 1
    $\begingroup$ Thanks to you everything is working fine now! How can I buy you a beer here? ;) $\endgroup$ – DerFerox Mar 26 '20 at 11:39

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