What feature would you use in SolidWorks to create complex shapes by interpolating between defined profiles?

The loft feature in SolidWorks is specifically designed for creating complex shapes by smoothly transitioning between multiple defined profiles or cross-sections. When using the loft feature, you can select several profiles that could be different shapes and sizes, and SolidWorks will generate a transitional shape that 'interpolates' between these profiles. This is particularly useful when creating items like aircraft wings, complex hulls, or any shape that requires a gradual change between different cross-sections.

The lofting process allows for significant design flexibility because you can also specify guide curves that help in controlling the shape of the lofted surface for even more complex geometries. This isn't something achievable with the other features listed, as they serve different purposes. For instance, the fillet feature is used to create rounded edges, while the face and revolve features are more suited for simpler shapes or operations, emphasizing the loft feature's unique capability in handling intricate, multi-profile designs.