Here are two simple movies that show creasing and extrusion. These movies are intended for reference in anticipation of the closed beta release later today.
Creasing
After accessing the T-Splines Crease command, two edges are selected and creased. This adds two partial isoparms, one on each side of the selected edges. To pull the crease away from the surface, control points are turned on, and the middle control points are moved vertically.
To show that the crease does not extend across the surface, control points further down the isoparm are moved; the surface is shown to be smooth at these points
Extrusion
After the T-Splines Extrusion command is selected, any number (in this case two) of face groups are selected on the plane. Next, the user is propted to select the direction and magnitude of the extrusion. Extrusion, unlike creasing, adds geometry to the model. The surface is still continuous and can be edited.
