Blender Tutorial How To Unsubdivide A Subdivided Mesh In Blender _ beginner Tutorial - YouTube
Unsubdivide only one direction? : r/blender
Pablo Dobarro on Twitter: "Multires can now unsubdivide and rebuild lower resolution base meshes. With this feature, you should be able to import projects from other software with all subdivision levels available. #
How to un-subdivide or undo subdivisions in Blender - Artisticrender.com