Some weeks ago I created videos for the Grease Pencil tool in Blender. I was asked to transform the sketch to a 3d mesh and how this works. So I decided to create a step-by-step tutorial which shows my personal way of doing this.
I will just create the basic modeling meshes and don't do any polishing in this video. If you are interested to see more of this (for example polishing mesh structure, UV seams and UV layout, texture & material) then please let me know in the comments. If something in not clear please let me know this in the comments as well.