To append to an nCache
After the simulation, an nCache is created for the frame or range of frames specified in the append to Cache Options window and is added or appended to the enabled cache.
If the appended cache frames overlap in time with the enabled nCache, then they are automatically blended with that cache. However, if there is a gap in time between the enabled nCache and the appended cache frames, then the gap range is simulated but no data for the gap is saved to the appended cache.