Eight-fold tracery, one wedge designed and mirrored round the rose, leaded in black. The eight glass colours are the eight q.d states. Tap a pane to re-glaze it: the change is repeated in all eight wedges, as a glazier would. Below, the light that passes through falls on the floor, moving with the sun.
ANALOGY q.d states as glass colours; the light on the floor is a simple projection, not optics. LIT rose windows are traditionally built with rotational (often 8- or 12-fold) symmetry from cames of lead. Self-check: every wedge carries the same glazing pattern (8-fold symmetry) and every pane is one of the eight q.d colours. ← SaPpH{{i}}on
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