Solid Modeling Options - High-Fidelity

High-Fidelity: Insert a check in the HiFi checkbox in the Solid Modeling Special Options tab to activate High-Fideling modeling. When selected, this option will "tweak" the final solid model (after any smoothing has been applied) such that the node values will do a better job of honoring the control points, regardless of the algorithm or the smoothing options which you've selected.

This is accomplished by modeling the residuals, adding the residuals model to the initial model, and then overwriting the node values with the original control point values. Unlike the grid version of high fidelity, this is not an iterative algorithm (too slow).