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I have an object (cube) replicated by modifiers. Now I want to cut out a dedicated other object (cylinder) from it using a boolean modifier (inspired by https://youtu.be/1aNnERnHRZg?feature=shared&t=109). Here is my attempt which shows no effect regarding the cutout. What am I missing here?

enter image description here

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  • $\begingroup$ just hide your cylinder and if this doesn't work try clicking "fast", if this still doesn't work, pls provide blend file $\endgroup$
    – Chris
    Commented Feb 15 at 9:19
  • $\begingroup$ .. just to illustrate Gordon's answer : .. imgur.com/a/HbyZrCH) $\endgroup$
    – Robin Betts ♦
    Commented Feb 15 at 11:17

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Is there a reason for the Geometry to Instances node? If not, just delete it:

no instancing

I do not know why inside the custom node group the Duplicate Elements node is set to Instance (EDIT: turns out, it only works with instances the way it is expected - I never use this node), but if it is necessary to convert the geometry, plug a Realize Instances node afterwards or at least as a final node before the output, because the Boolean modifier only works with "real" geometry, not instances:

realize instances

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  • $\begingroup$ Beat me to it :) (Markus did show you the contents of the Multiplikator group, in his illustration?) $\endgroup$
    – Robin Betts ♦
    Commented Feb 15 at 11:08
  • $\begingroup$ @RobinBetts Sure, didn't look close enough and was already editing my answer ;) $\endgroup$
    – Gordon Brinkmann
    Commented Feb 15 at 11:08
  • $\begingroup$ Realize Instances solved it for me. The Geometry to Instances was something from one of the gazillion Blender "Experts" on YouTube (if only Blender had documentation that would be useful instead of this reference manual that helps nobody to approach it). As a nonnative English speaker I do not understand whether I need the G2I and RI thing or not. At least it did not work for me. Could you please clarify / show if and how? $\endgroup$
    – Markus W.
    Commented Feb 15 at 11:55

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