\caption{Packed vector scatter with deterministic simulated data. (a) Thirty thousand observations from two overlapping normal distributions. (b) Twelve hundred observations with marker diameter and colour supplied per point. (c) Seven marker shapes, each drawn as a 300-point layer with constant physical stroke width. (d) Five thousand triangular markers in a painted window; markers, outlines and fills are cropped together. All data marks remain vector in SVG and PDF. Source indices and paint order are retained in packed buffers. These are rendering examples, not experimental measurements. MIT, Mark Marosi.}