Create a minimalist 3D render of a summer-themed ring designed as a half-sun, viewed from above, as if the ring is laid flat. The half-sun should be positioned at the top of the ring, featuring four evenly spaced branches extending outward as sun rays. The design should be clean and simple, with smooth, curved lines that evoke a sense of warmth and elegance. Render the ring in a neutral gray tone, with a matte finish that resembles an untextured 3D model in Blender. The lighting should be soft and even, casting gentle shadows that highlight the contours and details of the half-sun and its rays, while maintaining the minimalist aesthetic. The background should be plain and white, emphasizing the ring's design and creating a modern, clean look. The overall style should be fresh and summery, capturing the essence of the half-sun design with its four rays in a simple, understated manner.