Inflections occur when a curve changes direction from a 'positive' to a 'negative' curvature.
Inflections are fine when you have intended to create them as part of your design. 'Accidental' inflections however can be a problem, causing bad highlights. These can occur from your choice of CV positions, or can be created by some of the automatic tools in Alias for curve and surface creation.
Inflections can be highlighted by applying a curvature comb using Evaluate > Curve Curvature and selecting the Inflection Points display.
Bad Inflections
Sometimes the CVs are 'fighting against' each other to achieve a shape, and unintentional inflections are created. Always watch out for 'zig-zag' CVs and check the result with a Curvature Comb plot.
One way to reduce zig-zagging is to decrease the degree to either 2 or 3, and then increase it again to whatever is necessary.
