AI Prompt for Cinematic Chalkboard Portrait with Desaturated Sepia Hues

"Image from subject, cinematic medium shot with a slight low-angle perspective. The subject is leaning back against a surface, in a three-quarter profile view, gazing thoughtfully off-camera to the side. Wearing a rumpled white button-up shirt with rolled-up sleeves, a dark textured necktie loosely knotted, and brown chino pants. Standing against an expansive, worn black chalkboard covered in dense white chalk writing, diagrams, arrows, and philosophical text. The lighting is soft, diffused, and medium-key, originating from the right, creating gentle, open shadows and evenly illuminating the scene without harsh highlights. The overall image is brightly lit with moderate contrast, preserving detail in the mid-tones of the shirt and skin. Color grading is a warm, desaturated sepia with a distinct greenish-yellow tint, characteristic of aged film under warm fluorescent light. Blacks are slightly lifted but not crushed. Medium 50mm film grain is present throughout."