What determines the shape of the feature created using a round swept profile command?

The shape of the feature created using a round swept profile command is defined by the guide string. The guide string is a path that dictates how the profile will move and ultimately shape the created feature. It serves as the outline along which the profile is swept, allowing for the creation of forms that can follow complex curves and shapes. This is crucial for achieving specific design requirements, as the guide string can take on various geometries that ultimately influence the final profile of the swept feature.

In contrast, while the 3D sketch helps visualize the design and can be important for other aspects of modeling, it is not the direct determinant of the feature's shape in the context of a round swept profile command. The mesh body, typically used in surface modeling, does not have a role in defining the swept feature's profile. The sweep direction, while important for indicating how the profile moves along the guide string, does not itself dictate the resulting shape but rather affects the orientation of the sweep.