subdivision creases and boundaries can be handled by another set of subdivision rules along the vertices of the sharp edges. In lecture, Kayvon also mentioned that these sharp edges would separate two sides of faces and each side of the face would be subdivided separately (e.g. faces on the other side of the sharp edge would not be taken into consideration for the faces on this side during subdivision).
subdivision creases and boundaries can be handled by another set of subdivision rules along the vertices of the sharp edges. In lecture, Kayvon also mentioned that these sharp edges would separate two sides of faces and each side of the face would be subdivided separately (e.g. faces on the other side of the sharp edge would not be taken into consideration for the faces on this side during subdivision).