\caption{Hatch rendering checks with original simulated data and artwork. (a) Supplied simulated yields of 28, 46, 37 and 62 percent, with 30 percent fill opacity and independent solid outlines. (b) The same hatch brush under inherited fill opacities of 25 and 70 percent, with independent dashed outlines. (c) A section with an even-odd hole under rotation and nonuniform scaling; hatch spacing is measured in local millimetres. (d) Sixteen boxes whose widths differ by 0.01 mm, sharing hatch coverage while retaining their exact clips. All hatches, borders, axes and text are vector. No measured data or fitted uncertainty is shown. Recipe and artwork: MIT, Mark Marosi.}