How to extrude inwards on corners - Modeling - Blender Artists Community
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What is the fastest way to do a cut extrude / inward extrude? - Blender Stack Exchange
How to extrude inwards without leaving faces? - Blender Stack Exchange
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How to extrude inwards through face? - Blender Stack Exchange
How do I get rid of the extra faces created when extruding inwards? - Blender Stack Exchange
How to solve Blender's smoothing problems - .: Feeblemind :. Weblog
Extruding faces at the edge of a mesh to the inside creates weird geometry. Anyone know a faster/better way to get the result without deleting and creating new faces? Thx :) :
Leftover faces when extruding inwards? - Basics & Interface - Blender Artists Community
Extra Face occurs every time I extrude a face inwards - Modeling - Blender Artists Community
Is it possible to extrude an edge-adjacent face inwards without leaving extra faces on the side? : r/blenderhelp
Model, Texture, and Render a Photorealistic Kitchen in Blender and Yafaray
How do I get rid of the extra faces created when extruding inwards? - Blender Stack Exchange
How to "inside extrude" ? - Modeling - Blender Artists Community