Example of the initial positions of newly created particles using a random (top) and grid (bottom) distribution. A shell of particles was created between 1 and 3 stellar radii (R_*) and the x and y positions of a thin slice (|z| < 0.05 R_*) are shown. The positions are scaled to match the given density profile (see Appendix A). Note that this is merely an illustration of the difference between random and grid initial distributions. In real simulations, the shells would generally be much thinner.