Extruding Surfaces from a 2D or 3D Face

You can create extruded surfaces from models that include 2D or 3D faces and knit the extruded surfaces to surrounding features.

1. Click Insert > Surface > Extrude.
2. Select a face:
   • To extrude from a 3D face, select a 3D face.
   • To extrude from a 2D face, press Alt + select the planar face.
   You can select either a surface or the face of a solid body.

   You can also preselect the 3D faces to extrude before clicking Insert > Surface > Extrude.
3. Select other faces to define the extrude as required.
   You can select faces that are not touching when you create a surface extrude in a given direction.
4. Select the end condition.
5. For 3D faces, select a plane, edge, 2D face, or sketch line to define the direction of extrusion .
   Select a plane to define an extrude direction normal to the plane.
6. To remove the faces defining the extrude from the model after extruding, click Delete original faces.

   The green area is the face defining the extrude.	The resulting model is hollow where the face was deleted.

7. To create a single body from the extrude when faces are deleted, select Knit result .
   Clearing Knit result produces two separate bodies.
8. Set other options and click .