Generate a full Roblox-style head with the same proportions as the default Roblox head. Then REMOVE everything below the top 60–70% of the head. Keep only the top section. The top part must be perfectly smooth and solid matte black with NO lines, NO cracks, NO grooves, and NO textures. The cut area must be a perfectly clean horizontal line. Do NOT use any transparency or glass material — only a simple solid black smooth top cap.
