This is from Miky Grudic’s website here:
http://www.tapir.caltech.edu/~mgrudich/movies.html
go there for more info! From his description: Here we simulate a 2 million solar mass molecular cloud with radius 100 parsecs, using driven isothermal MHD turbulence as our initial conditions. We form a hierarchically-clustered complex resembling the Carina OB1 association, with both bound and unbound clustersm, including a mixture of clusters that are long-lived and ones that undergo infant mortality. Check back for the paper soon!