Corner Extrude is a simple and robust modeling tool for quickly creating corner geometry from any cross-section selection in Edit Mode. After selecting part of your mesh in Edit Mode and specifying an Active Edge, you can now use the Corner Extrude command to turn your geometry around that edge and extend it to create a geometric corner. It’s really simple but kind of hard to explain, so please refer to the visuals
- Installation steps are standard. In Blender User Preferences > Add-ons, click Install Add-on from File… Then browse to the Corner_Extrude.py file that you downloaded and install it. Then enable it.
- I highly recommend adding a new Hotkey for mesh.corner_extrude under 3D View > Mesh.
- The add-on is also compatible with Blender 2.8. I will update the add-on according to the changes related to the development of Blender 2.8 API.
Either use Search Menu (default Spacebar) and type in Corner Extrude or assign your own hotkey to mesh.corner_extrude
The command is designed to be used with a cross-section of your mesh, i.e. flat geometry, but I’d be interested to see if you can find other uses for it. So in Edit Mode select some geometry - can be Verts, Faces or Edges. After that switch to Edge Mode and select one Active Edge . The Active Edge will act as a hinge for the other selected geometry to extrude and rotate around.
What if my mesh doesn’t have an edge that is suitable as a rotation pivot?
In some cases you have to create a temporary edge by extruding out a vertex at the desired angle. This can then be used as the Active Edge for the Corner Extrude to pivot around. Afterwards just delete the vertex and the floating edge will be removed. Here’s an example of what that might look like: