Strong rule: style --- Realistic Photography ---. Vertical 9:16 frame. Medium shot of the teacher standing right next to the chalkboard. He is holding a pointer and touching a specific technical diagram of a railway switch point drawn in chalk. Sunlight illuminates his face naturally. Highly detailed, documentary footage style, no stylization.
Character appearance reference (MUST match exactly):
- Преподаватель: Strong rule: style --- Realistic Photography ---. Middle-aged man, 50 years old, short grey hair, wearing a neat light blue button-down shirt and a dark tie. Professional, knowledgeable expression, realistic facial features, documentary style realism, no stylization.
