Holes in Mesh, when using Subdivision Surface Modifier - Blender Stack Exchange
Subdivision behaviour is different than in any other software causing compatibility issues - #17 by postrowski5 - User Feedback - Blender Developer Talk
2.8x] Crease option for Subsurface modifier. — Right-Click Select
How do I make the edges sharp after using subdivision surface modifier? - Basics & Interface - Blender Artists Community
Subdivision Surface Modifier — Blender Manual
having problems with the subdivision surface modifier : Blender, Technology : r/blender