But the most disturbing feature—the one her father had annotated in a hidden memo on his phone—was the "Depth Scan" mode. Activated by triple-tapping the viewfinder, it didn't just show echoes. It showed layers . You could slide a toggle from "Layer 0" (present reality) to "Layer -1," "Layer -2," and so on, descending into what the app’s debug log called "the sediment of time."