The rotation decision needs a size, not just a direction. A per-level LUT fitted
on a screen is the most general tone model possible, so whatever it cannot close
is by construction spatial. Self-fitted, it closes 70.3 percent on the main menu
-- the positive control, where the port measures 0.06 percent so geometry is
right -- and only 32.0 percent on the title. At most a third of the title s
disagreement is tone; at least two thirds is geometry.
Also warns the port off a global tone correction: the curve does not transfer.
Fitted on the title and applied to the menu it closes 29.7 percent; the other way
round it makes the title 24 percent worse.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QsEPXWVaEpyfudtR6re1Pd
ce5505872b