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We would like to use dark matter density in one of our simulations, however the build-in derived field ('deposit', 'N-BODY_density') is too noisy for our purposes. We can think of two ways to make it smoother: 1) to reduce the max refinement level of the underlying grid or 2) use SPH-like averaging on particles first before depositing them on the grid.
Since we are newbies, could someone give us a few hints on how to proceed with one or both of these approaches?