Check your model before beginning the
fillets. The edges of the trimmed model must be clean as it is not
possible to correct a model using the various options in the Surfaces > Surface Fillet tool option box.
Many curves that define feature lines
are planar in a special view. Once you have achieved an acceptable
shape, planarize the curve to refine the shape.
When modifying planar curves, the planar
characteristics must be maintained. Use the SLIDE or NUV options
in the Control Panel > Evaluate > Move CV tool. The NUV option
works on curves, but does not maintain planar characteristics on
surface edges.