Convert this image into a pure grayscale bump map. No color, no lighting, no shadows, no painting effect. Only height information: light = raised, dark = recessed. Flat technical output.
negative prompt
No color, no beige tones, no green tones, no brown tones, no illustration, no watercolor, no artistic shading, no soft atmospheric depth, no cast shadows, no highlights, no 3D rendering, no perspective, no realistic scene, no mural appearance, no texture painting, no normal map colors, no blue, no purple.
