I was proud of my topology until I tried subdividing... I need the empty quad face to remain sharp, help please! [More info in comments] : r/blenderhelp
BLENDER BASICS 15: Subdivide, Fill, and Merge - YouTube
Subdivision Surface Modifier — Blender Manual
How to Subdivide in Blender - cgian.com
How to SUBDIVIDE a 3D model in Blender }
modeling - How can I subdivide a face which is next to a face that is already subdivided? - Blender Stack Exchange
Can't Subdivide Face... why? - Modeling - Blender Artists Community
How to subdivide in Blender 2.8 & 2.79 | Tutorial - shortcuts - YouTube
How to Subdivide a Plane, Face, & Cube in Blender - cgian.com
Subdivide — Blender Manual
Subdivide — Blender Manual
How to SUBDIVIDE a 3D model in Blender }
Subdivision behaviour is different than in any other software causing compatibility issues - User Feedback - Developer Forum
How To Subdivide In Blender? (3 Different Methods)