Subdivision surface in Blender 2.8 behave different compared to Maya and ZBrush - User Feedback - Blender Developer Talk
Subdivision Surface Modifier — Blender Manual
modeling - How to stop smooth shading/sub surface distorting render - Blender Stack Exchange
Subdivision surface in Blender 2.8 behave different compared to Maya and ZBrush - #19 by postrowski5 - User Feedback - Blender Developer Talk
Normals — Blender Manual
Preparation before bringing the object created in BLENDER to Clip Studio_Part 2 (About smooth shade) “BLENDER + CLIPT STUDIO #2” by Hydrocallis - CLIP STUDIO TIPS