Superman facial expressions grid illustration

This is a clean, graphic illustration sheet featuring a 3x3 grid of Superman's head. Each cell displays the same classic comic-book style rendering of the character but with a different facial expression, showcasing a range of emotions from neutral and pensive to surprised, shocked, and terrified. The art style utilizes bold black linework, flat shading with distinct cell-shaded highlights, and a consistent palette of skin tones and black hair. The background is a solid, dark gray, which creates a sharp contrast against the illustrations. The expressions are meticulously detailed, varying the shape of the mouth, the arch of the eyebrows, and the width of the eyes to convey emotional nuance. The composition is highly symmetrical, designed as a character model sheet for animation or artistic reference, with the heads centered within each cell, providing a comprehensive look at Superman's visual character design.