Some Blender stuff to look into re offsets/insets:
- https://blenderartists.org/t/offset-edges/584283/232 -- whole thread is really interesting. Relates to: https://github.com/helluvamesh/HidesatoIkeya_OffsetEdges
- https://blender.stackexchange.com/questions/42643/offset-edges-along-a-plane
- https://blender-addons.org/offset-edges-addon/ -- same as above?
- https://blenderartists.org/t/extruding-problem/585454/14
- https://blenderartists.org/t/edge-offset/414733/4
- https://blender.stackexchange.com/a/1092
- https://www.blender3darchitect.com/modeling-for-architecture/architectural-modeling-tip-how-to-offset-faces-in-blender-3d/
- https://www.youtube.com/watch?v=wf6xRnH_MAU
- https://www.youtube.com/watch?v=B62SmzSLKdA