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30fd02d165
Standard preset CRF 23→18, high preset CRF 18→15. The previous CRF values produced visible color banding on dark gradient backgrounds — a recurring issue in eval (prompts 3, 5, 10, 14 all flagged gradient banding). Lower CRF increases file size but eliminates the banding that made otherwise-good compositions look unprofessional. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>