Create a 3D mockup image of a ring shaped like a half-sun, rendered in a minimalist black and white color scheme. The ring should be displayed with a clean, simple design, featuring smooth, elegant lines that form the semi-circular sun shape. The rays of the sun should be subtly raised, adding depth and dimension to the design, while maintaining a sense of simplicity. The image should have a 3D model-like appearance, with smooth, matte textures and soft lighting to emphasize the contours and details of the ring. The background should be plain and uncluttered, allowing the focus to remain entirely on the ring. The overall style should be modern, clean, and refined, with a strong emphasis on the contrast between light and shadow to create a striking black-and-white visual.