In Creo Parametric, you can create freeform surface models using the Style and Freestyle modeling environments.
DATASHEET FREEFORM SURFACING USING CREO PARAMETRIC
In this course, you will learn how to use the Style and Freestyle environments to create and manipulate freeform curves, freeform surfaces, freeform surface details, and advanced freeform surface models. You will also learn how to integrate style features with other parametric features in design models. After completing this course, you will be well prepared to design complex-shaped freeform surface models in Creo Parametric.