A visualisation of the predictions made from our M − D relation (Equation 4) on a single time slice of the log mean column density from the M = 4 simulation. We show regions of the cloud in blue boxes that are undergoing turbulent motions from M = 1 to M = 4, in 0.5M increments, indicated by the label in the corner of each of the boxes. Our method uses wrap-around boundaries, so the /L × /L region wraps around the simulation data as it expands. We initialise our method at the maximum column density, Σ max. The code for our method is publicly accessible, from: https://jrbeatti@bitbucket.org/jrbeatti/fractal-dimension-spectrum