Editing Autodesk 3ds Max (section)

=== Constrained animation ===
: Objects can be animated along curves with controls for alignment, banking, velocity, smoothness, and looping, and along surfaces with controls for alignment. Weight path-controlled animation between multiple curves, and animate the weight. Objects can be constrained to animate with other objects in many ways — including look at, orientation in different coordinate spaces, and linking at different points in time. These constraints also support animated weighting between more than one target.
: All resulting constrained animation can be collapsed into standard keyframes for further editing.