Curve Generation Settings
The Parameters tab on the Auto Surface tab allows you to specify values for curve generation. This option sets granularity and character level for the surface of the model.
Granularity represents the number of possible features or curves for a model surface. A higher granularity value implies that you need to select more curves. Do not set granularity to a very high value as this may introduce noise when a large number of curves are selected.
Character level
The value specified for character level determines the amount of curvature required for a line to be designated as a curve. A higher value of curvature level requires a higher amount of curvature for the line on the model's surface to be designated as a curve.