Create a Pixar-style 3D character: a cheerful young man wearing a bright yellow hoodie with a green 'U' on the chest, light blue rolled-up jeans, and white sneakers. Add a green beanie on his head. Pose him standing confidently with arms relaxed. Use a vibrant color palette and soft lighting to highlight details. Set the background as a bold black-and-white geometric pattern for contrast, ensuring a polished and stylized Pixar-inspired look. The model should be in A pose.