The ring is capped at darken on dark of the lightness of the garment behind it, so light art keeps the ink exactly as it is and only a line that had stopped reading gets darker. 1.00 = one flat ink everywhere, the way it shipped before 2026-08-31.
Some masters came back with a black band painted round the figure β 4 px on hero-t2, 8 px on base-m2-t2, against hero's 2 px. This erodes it back to a line. A pixel goes only if it is darker than half the paint behind it AND backed by more of the same, so a real 1β2 px cel line is never eaten.
hero-t2's hair is not outlined β it is painted almost black. The dark run inward from the silhouette is 1β4 px at every row of hero's head and 11β20 px down the sides of his, in (31,18,5); only the top curls kept their brown. No contour setting can reach that. only coloured keeps the lift off a neutral black costume (34,34,34); only masses keeps it off the coat's own painted ink, which is warm too but 1β2 px. 1.0 = off, and it is the one control here that rewrites the master's paint.