On Aug 26, 2020, at 11:48 AM, Matthew Turk <matthewturk@gmail.com> wrote:

Just so I am completely sure I understand, are we operating on the assumption that the tracer particles will *not* be in the same *file* (not necessarily chunk) as the gas particles they're assigned to?

Hmm, good question. I do not know how this works in terms of multiple files (I always just dump one file per snapshot). But maybe let’s assume they are in the same file.