Struggle to model a cut cylinder!!!

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  poopipe grand marshal polycounter

  Jun 21 2026

  check this thread 
  
  https://polycount.com/discussion/56014/how-the-f-do-i-model-this-reply-for-help-with-specific-shapes-post-attempt-before-asking#latest
  
  TLDR:  you need more geometry and religiously sticking to quads can cause you problems

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  sacboi grand marshal polycounter

  Jun 24 2026

  While you're at it also checkout Frank's sketchbook for indepth breakdowns of why-'n-how one might approach modeling HS shapes:

  https://polycount.com/discussion/221392/sketchbook-frank-polygon/p1

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  maaboo

  Jun 25 2026

  I'm a just a beginner, correct me if I'm wrong.
  
  First of all, you should never-ever-ever touch (move, add, delete) edges that create a curved surface. You alter ONLY perpendicular cuts.
  
  Second, I made something like this before:
  
  
  Steps:
  

  • Create a low poly and add cuts to form the edges of the future flat surface (in my case there was only 3 faces tall).
  • Delete faces and fill the gaps.

  To get the high poly version:
  

  • Separate flattened surface into another object
  • Delete faces that form the flattened surface
  • Heal the cylinder by filling the gaps
  • Apply subdivision (better to temporary delete the bottom and top faces to prevent curving the cylinder) and adjust vertices
  • Extrude the face you separate previously and make a boolean cut
  • Delete faces made by the cut and fill the gaps
    

  You can also get the principle here: https://www.youtube.com/watch?v=cbXWWE8-X0M

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