Create a high-quality 3D accessory for a Roblox avatar: a snowman head that fits the standard Roblox head shape and proportions (rounded blocky cylinder style, not a sphere or oval). The base should clearly match the default Roblox head dimensions so it sits correctly on an avatar. The snowman head should be smooth white snow with a clean, slightly stylized Roblox look (simple, cartoony, and not overly realistic). Facial features: Two small, round black coal eyes, evenly spaced A dotted coal