Generalizes bicubic B-spline refinement to meshes of arbitrary topology. The standard modelling surface in film, and the reason quad topology is the convention it is.
supersedescorrects · extends
classifiesspecializes · part-of
substitutes forapproximates · alternative-to
depends onrequires · validates
Colour is the family; a dashed line is the second member of it.
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specializesis a specific case of Subdivision Surfacesbicubic B-splines extended to arbitrary quad meshes
References
Recursively Generated B-Spline Surfaces on Arbitrary Topological Meshes — Catmull, Clark — 1978 · link