Which command is typically used to create complex shapes by blending multiple profiles?

The loft command is specifically designed for creating complex three-dimensional shapes by connecting multiple profiles or cross-sectional outlines. This command allows users to define a series of shapes that blend smoothly together, which is ideal for creating intricate forms often found in industrial design, automotive parts, and aerospace components.

When using the loft command, you can select several geometric profiles at different heights or orientations. The software then generates a smooth transition between these profiles, creating a unified shape. This capability to interpolate between various forms makes lofting particularly powerful for achieving designs that can't be easily created using simpler commands.

In contrast, other commands serve different purposes. For instance, the fillet command is used to create rounded edges between adjacent surfaces or lines, which is primarily a way to enhance aesthetics and reduce stress concentrations. The revolve command creates shapes by rotating a profile around an axis, resulting in symmetrical geometry, while the extrude command elongates a profile in a straight line to produce a three-dimensional object, typically maintaining uniform cross-sections throughout. None of these alternatives offer the same flexibility and capability to blend multiple profiles as effectively as the loft command does.