Synchronous modeling commands work best on what types of faces?

Synchronous modeling commands are designed to work best on analytical faces because these faces are defined by mathematical equations, such as planes, cylinders, spheres, and NURBS surfaces. This makes them more predictable and allows for precise manipulation and editing. The inherent nature of analytical geometry ensures smooth transitions and accurate regeneration of the model when changes are made.

Unlike trimmed B-surfaces, which can be more complex due to their topology and boundaries, or facet faces, which are represented by a collection of flat surfaces that approximate a smooth surface but lack the mathematical definition of analytical faces. X-form faces, which relate to transformed geometry, may also not utilize synchronous modeling as effectively as analytical geometry. Consequently, analytical faces are the preferred choice for synchronous modeling tasks, allowing for significant geometric changes while maintaining design intent and integrity.