Which type of feature would utilize two different shapes to create a solid form?

A loft feature is designed specifically to transition between two or more different shapes to create a smooth and continuous solid form. It connects multiple profiles (cross-sections) that may be of varying shapes and sizes, allowing for more complex geometries than other features.

For instance, if you have a circular profile at one end and a square profile at the other, applying a loft will generate a solid that smoothly blends between these two shapes. This makes it particularly useful for applications where a smooth transition is necessary, such as in aerodynamic structures or when designing complex organic shapes.

In contrast, an extrude feature typically creates solids by pushing a single profile through a specified distance, while a sweep uses a profile and a path to create a solid but does not inherently involve multiple cross-sections. A fillet, on the other hand, is applied to edges to create rounded transitions rather than forming a new solid from multiple profiles.