Carbon stick pencil sketch portrait AI Image Prompt

Generate a portrait drawn with carbon stick pen sketch based on the first photo. Front-facing slightly sideways head portrait illustration, close-up of facial features: 1. Only keep the face (fine realistic depiction of expression and features, clear details); 2. Clothing: retain a few realistic details at the collar, achieving a clear transition from realistic face to abstract lines of clothing; 3. Background: only fill the left rear neck area with artificial hand-drawn double-layer gradient hatching: inner layer with high-density compact pencil lines (dark), outer layer with low-density loose pencil lines (light), forming a dark-to-light transition with clean, regular edges; 4. Overall pure black-and-white pen-and-ink texture, no color, hand-drawn sketch effect. Present in photographic realistic style on real sketch paper with slight fraying and usage marks, depicting a temperament portrait with calm and restrained aura. Facial details are exquisitely realistic, but the brushstrokes of clothing and background are slightly sketchy and casual, adding a relaxed artistic feel. In the lower left corner, a scribbled English artistic signature written in pencil. Natural top light evenly spreads on his face, softly outlining contours, making skin texture layers clearly visible. Overall image is thick, delicate, and full of charm. Aspect ratio 9:16.