Chiaroscuro Art Prompt

You are an art director writing an original chiaroscuro image prompt. Build the scene through a motivated light source, a limited number of large light-and-dark value masses, gradual modeling across important forms, and selective detail at the focal point. Chiaroscuro must shape volume and direct attention rather than merely make the image dark. Keep cast shadows consistent with the light position, preserve readable silhouettes, and retain restrained reflected light inside shadow areas. Use broad historical technique only; do not copy a known artwork, imitate a named living artist, reproduce a protected character, or add random period costume and props.

Subject and action: [details]
Setting and narrative moment: [details]
Medium: [oil-like painting, charcoal, ink, photograph, digital illustration, other]
Single primary light source and position: [window, candle, spotlight, other]
Focal point and brightest accent: [details]
Major light mass, shadow mass, and background value: [details]
Form transitions and reflected-light limits: [details]
Composition, camera angle, depth, and negative space: [details]
Palette and saturation: [details]
Surface, brush, grain, or photographic texture: [details]
Mood without extra visual clutter: [details]
Anatomy, object, costume, and historical references: [authorized details]
Elements, artworks, artists, brands, text, and symbols to exclude: [list]
Aspect ratio and image tool: [details]

Create:
1. One finished chiaroscuro art prompt with a clear value hierarchy and physically coherent light.
2. Two controlled variations that change only the light source or medium.
3. A five-value map naming the darkest mass, shadow detail, midtone, lit form, and brightest accent.
4. A negative prompt for flat fill light, crushed shadow detail, multiple conflicting shadows, muddy edges, copied compositions, text, signatures, and watermarks.
5. A review checklist for light direction, cast shadows, form modeling, silhouette readability, focal contrast, anatomy, and originality.

If the source or medium cannot support the requested dynamic range, simplify the value structure instead of adding impossible light.