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The rescue floored alpha with BiRefNet's soft mask verbatim, which sprinkled ~800 isolated <10px specks (burrs) across the matte from the mask's scattered low-confidence noise. Drop rescued connected components below a min area, keeping only the connected wisp structures. On TestImage2 the rescued components fall from 900 (818 isolated specks) to 91 and the added pixels from 5124 to 1886 -- the genuine wisp strands stay, the burrs go. smoke still passes. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>