Boolean is not making a hole, but just cutting the mesh and not filling in the sides of the would be hole. : r/blenderhelp
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Blender 3D Modeling: A Comprehensive Guide - Ahmad Merheb
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Holes in Faces — Blender Manual
A better way to fill in a mesh - Blender Video Tutorial | LinkedIn Learning, formerly Lynda.com
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Fill Boundary Holes Modifier — Right-Click Select
3 of The Best Ways of Filling & Merging Holes in Meshes in Blender 2.8 - Tutorials, Tips and Tricks - Blender Artists Community
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Fill — Blender Manual
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Smart Fill Blender Add-on - Blender Market
Fill — Blender Manual
Blender: Bridging Gaps and Edges/filling holes. - YouTube
FILLING HOLES in Meshes with Grid Fill in Blender! - YouTube
modeling - How to fill a rectangular hole with an even amount of vertices on either side? - Blender Stack Exchange
