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After Effects feathers both edges of the wiped wedge (the start ray too) with a Gaussian whose width is constant in pixels: Completion 40, Start Angle 30, Counterclockwise, Feather 20 (AE 2026, case 904 E12) fits sigma = 0.4 x Feather = 8.0 px at every radius (mean alpha error 0.0002 over the frame). EffectCraft ramped only the moving edge, linearly over Feather degrees, so the edge was 14 px wide near the centre and 140 px wide at 400 px out, and the start edge was hard: 378 of 5184 grid points off (max 111/255, 6.6 % of pixels > 8), now 1 (max 3), 0.009 % of pixels > 8 (near the centre). CPU and GPU (the kernel now measures distances to the two rays). 0 % and 100 % are unchanged, so the three Transitions presets keep their end frames; their Feather (6 / 10) now means pixels. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>