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I am trying to extrude the surface of a lower jaw. The surface from the outside, the inside and the top. they are selected as one object from the stl file of a mandible. when extruded in the z axis, one side is extruded (eg the outer) while the opposing side is extruded to the inside of the mandible. Is there a way to extrude relative to the original object so I end up with extrusion from both sides similar to each other.this picture represents the area I selected from the surface of the mandible in this picture I want to extrude to the outer side and to the inner side as well

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Press Alt+E then select Extrude along normals.

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  • $\begingroup$ thanks a million you rock $\endgroup$ – Ahmed Barakat Apr 13 at 3:27

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