Created two 640 by 480 synthetic PNGs. Both share a central gray circle and dark rectangle on white; one adds a black rectangular frame 12 pixels wide inset 22 pixels. Both were opened in the current production snapshot in Chrome 156.0.8078.80, Clean Outline and A4, and actual PNG downloads saved. Outputs 3508 by 2480; per-position RGB comparison found 289016 differing positions of 8699840. The framed result visibly contains frame outlines. See inputs, outputs and measurements.json. App SHA256 fb728a912378c8e7350a98bbbe3b656a5da1c96955411e3c3ec9e83b30dea13c. Not a photograph or physical print.