Close holes of organic surfaces - Modeling - Blender Artists Community
8 Tips for Clean Topology in Blender (Updated for 2021) - CG Cookie | Learn Blender, Online Tutorials and Feedback
3 Ways to CUT HOLES in Objects in Blender - YouTube
blender fill object, blender fill hollow object, Fill in gaps in your mesh, grid fill, fill holes - YouTube
modeling - How can I close a big hole in a mesh? - Blender Stack Exchange
Mesh concepts — Blender for 3D Printing
Blender 2.8 Three Ways of Filling Different Types of Holes | Hello everyone! This is a beginner's tutorial showing you different ways to close 3D model mesh holes using the new Blender