Once your nCloth is ready, you can begin simulation by playing back your scene. The Maya Nucleus solver performs the simulation, computing all the parameters and settings for all of the objects in its system.
Caching can play a key role in simulation. A cache file stores all vertex transformation data for your nCloth. Having a cache reduces the number of calculations Maya performs when playing back or rendering scenes because the cached simulation data can be read from disk, instead of being dynamically computed.
There are different approaches to caching nCloth. You can have a series of cache files containing data for each frame or you can have one cache file that contains all the data for all the frames of your nCloth’s simulation.