To avoid ambiguity, the bottom link to the video. There to show the design of patches and sweep and blend with the continuity and curvature of all surfaces:
http://www.youtube.com/watch?v=skDq_eBpdFQ
http://www.youtube.com/watch?v=xCLpWeN9AlU
http://www.youtube.com/watch?v=pscuHv8Ii7o
http://www.youtube.com/watch?v=SPVZQQCvpYo
Speed ​​and simplicity. If you finish the MOI 3D, making continuity functions in the network, and other tools, it will also cool