Here is a little tip, how to simulate collisions with pre-animated objects using the Bullet simulation system in Maya:
- Duplicate your already animated object.
You may need to create a bit different (optimized) version of it, or you can create a collision object from scratch (maybe multiple objects, depends on the complexity of the original object).
- Convert the new object (or objects) to a Kinematic RigidBody (you can also change that after the conversion).
- Create a Parent Constraint between the two (Select the original object first!).
- Of course you need some Dynamic RigidBody object for the simulation as well. 🙂