Weights

3-D FFS > Process > Weights

As for splines, weights are the homogenizing factors for freeform surfaces.

Increasing the weight of a point lying on the de Boor polygon causes an approximation of the B-spline and the de Boor polygon. B-spline surfaces with weights ≠ 1 automatically become NURB surfaces.

 

Left: Original surface, Middle: Weight changes at the points marked in red. Right: Modified surface

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