3DS MAX – Micro Reference Manual – Animation – Constraints – Surface
It can drive:
– position
The Surface constraint restricts an object to the surface of another object. Its controls include U and V Position settings as well as an alignment option.
GENERAL
1. Create a big Sphere
2. Create a small Box
3. Select the Box> MAIN TOP MENU> Animation> Constraints> Surface Constraint
4. You will see in the viewport a rubber band> click over the Sphere
5. The Box move over the Sphere surface
6. You can animate the Sphere surface