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The video starts by examining SubD surfaces and how these compare to NURBS before moving on to look at some examples of how and why SubD can be used alongside the traditional NURBS workflow in Rhino. Similarly the Control Point Curve and Interpolated Curve have ‘SubD Friendly’ options that allow accurate SubD surfaces to be produced from a curve layout in a similar method that one might employ for NURBS modelling but with the advantage of the inherent smoothness of SubD surfaces. Whilst traditional SubD ‘push-pull’ editing of edges, faces and vertices is enabled, Rhino’s surface commands such as Loft, Revolve, Sweep 1 & 2 and Extrude all now produce direct SubD output. Rhino SubD objects are, however, high precision spline based surfaces and thus introduce a level of accuracy to the process of creating complex freeform shapes. “ Traditionally SubD objects are mesh based and lend themselves well to more approximate types of modelling such as character modelling and creating smooth organic forms that are controlled in an approximate fashion.

Sub d modeling rhino