Grayscale depth map for a stereogram, 9:16 vertical, 2K resolution. Pure black background (RGB 0,0,0) representing the far plane. In the center, a clean bold silhouette of a MERMAID (long flowing hair, graceful upper body, curved fish tail) filled in medium-to-light gray (about 60-80% brightness), occupying roughly 55-65% of the frame. The mermaid silhouette should have soft internal gradient: slightly brighter toward the center of the body and head, slightly darker toward the outer edges, with a gentle 3-5px soft blur along the contour to give readable rounded depth. Simple, large, recognizable shape with a clear outline, no small fiddly details, no texture inside, no color, no text. Only smooth grayscale values — this is a technical depth map where lighter = closer to the viewer.
