Create a minimalist 3D render of a summer-themed ring designed as a half-sun, viewed from the side with the top of the ring (the half-sun) facing the viewer. The half-sun should feature four distinct branches extending outward as sun rays, evenly spaced and elegantly curved to add a sense of warmth and energy while maintaining a minimalist aesthetic. Render the ring in a neutral gray tone, with a smooth, matte finish, resembling an untextured 3D model in Blender. The lighting should be soft and even, highlighting the simple yet refined contours of the half-sun and its four rays. The background should be plain and white, enhancing the minimalist feel and focusing attention on the ring. The overall style should be modern, clean, and summery, emphasizing the simple beauty of the half-sun design with its four rays.