Instant3D Sketch Selection and Existing Geometry Selection Criteria Default Feature Created Example A sketch contour contained on a face Cut extrude Video: Creating a Cut Extrude From a Sketch Contour Contained on a Face A sketch contour that does not touch a face Boss extrude Video: Creating a Boss Extrude From a Sketch Contour that Does Not Touch a Face A sketch contour that overhangs a face. Select the contour on an area that touches the face Cut extrude Video: Creating a Cut Extrude From a Sketch Contour that Overhangs a Face A sketch contour that overhangs a face. Select the contour on an area that does not touch the face Boss extrude Video: Creating a Boss Extrude From a Sketch Contour that Overhangs a Face If you select a sketch contour that does not touch a face and first drag it as a boss extrude, it remains a boss extrude even if you drag the contour into existing geometry. Video: Creating a Boss Extrude From a Sketch Contour that Does Not Touch a Face Parent topicCreating Features in Instant3D Related concepts Features Supported by Instant3D Related tasks Snapping With Instant3D Creating Features Using the Midplane