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Inset Extrude
Inset and Extrude selected polygons
UI location View3d > hotkey I, when in Edit Mesh mode
Usage Select a face or faces, hit the Inset button, adjust the inset amount, height, using the mouse in the 3d view or...
Version 0, 5 Author(s) Jon Sandström
Blender 2.57 License
Category Mesh Distribution Upload
Note(s) ....

Executable information
File name mesh_inset_extrude.py
Current version download https://svn.blender.org/svnroot/bf-extensions/contrib/py/scripts/addons/mesh_inset_extrude.py
Python modules math

Warning This is an alpha version.
Links BlenderArtists thread
Known Issues TODO:
  • Sometimes normals calculates incorrectly.
  • if two selected "islands" meet with corners in one point, the mesh is calculated incorrectly, or the script fails.
  • in some special cases the new selection is calculated incorrectly.


  • To Do


Method 1:

  • Copy the file to the "addons" folder of your blender installation. the location should be similar to this: 2.57/scripts/addons
  • Restart blender
  • Open the user preferences window (Ctrl+Alt+U) and selecting the "Add-Ons" tab, then type in "inset extrude" in the search field and enable the addon by ticking the checkbox in the top right corner.
  • The addon is now ready for use

Method 2:

  • Open the user preferences window (Ctrl+Alt+U) and go to the "Add-Ons" tab.
  • Click the "Install Add-on..." button in the bottom list, locate the file on your hard drive and install it.


Inset a selection:


  • select the area/areas you want to inset, then click the I key to execute the tool. For big selections the script may take a second to load.
  • move the mouse horizontally to until the desired result is achived.
  • confirm by clicking the left mouse button
Inset and extrude the selection from surface:


  • repeat the previous steps, but instead of clicking the left mousebutton, click and drag vertically to extrude from the original surface.
  • confirm by releasing the left mousebutton.
Inset and extrude with exact values:
  • Once the tool is executed and in interactive mode, the user can input numerical values for both inset and extrusion. the numpad operators "/, *, -, +" will also function as mathematical operators.
  • Press enter to confirm the numeric input.
  • Holding Shift will increase the sensitivity
  • Holding Ctrl will snap to 1 decimal place. Combined with Shift it will snap to 2 decimal places.
Creating a shell:


  • Select all faces of the object you want to make a shell for.
  • Duplicate the selection with Shift+D and press the right mousebutton to cancel the translation
  • click I key to start the tool (remember it may take a few seconds to precalculate large selections). type "0" and press enter, then move the mouse until the desired thickness has been obtained
  • remove doubles and check the face normals

How it Works

To Do