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hi after enabling subdivision surface i get this error

enter image description here

enter image description here

basically i cannot subdv because i get weird errors what i want is to do something similar to

looks horrible and if i select the ring and bevel it to fix it , it looks horribler too

enter image description here

this is the top of the cilinder topology i do not see why looks like that when added subsurf

enter image description here

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    $\begingroup$ Hello, the top of your cylinder has a weird topology $\endgroup$
    – moonboots
    Commented Jan 6 at 22:44
  • $\begingroup$ hello @moonboots how can i improve that? is there any tutorial you can recomend me $\endgroup$ Commented Jan 6 at 22:47
  • $\begingroup$ added new post showing topology is default i dont know anything about topology i just extrude and bool $\endgroup$ Commented Jan 6 at 23:03
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    $\begingroup$ It looks as if the top has had Grid Fill applied to it for some reason? Can you show the first image in Edit mode? $\endgroup$
    – John Eason
    Commented Jan 7 at 0:43
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    $\begingroup$ A nice reference for topology: topologyguides.com good topology is important when using the subdivision surface modifier $\endgroup$ Commented Jan 7 at 1:28

1 Answer 1

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Supporting Edge Loops Needed

The pinching you're seeing with the Subdivision Surface modifier on your cylinder can happen when there are no supporting edge loops near the edge between the side of the cylinder and its cap.

Here's a screenshot of how I might approach the topology for your shape:

enter image description here

Here's a good reference for topology: https://topologyguides.com/

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  • $\begingroup$ how do i do a edge loop? $\endgroup$ Commented Jan 7 at 3:10
  • $\begingroup$ how do add an edge loop?, control + R ? $\endgroup$ Commented Jan 7 at 3:20
  • $\begingroup$ thank you, it worked i just had to add some loops around the cuts $\endgroup$ Commented Jan 7 at 5:23

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