Forward time sequence of volumetric density renderings from a 512³ periodic-box simulation with self-gravity in DIFFHYDRO. Beginning from a turbulent initial density field (t = 0), self-gravity rapidly amplifies fluctuations, forming transient knots and filamentary structure (t ≃ 1–3). Subsequent nonlinear mergers and relaxation concentrate mass into a small number of compact overdensities by late times (t ≃ 4–5) supported under hydrostatic equilibrium. This simulation serves as a controlled numerical demonstration of self-gravitating turbulent dynamics, not a model of a specific astrophysical system.