Create a photorealistic 3D rendering of a modern mixed-use apartment building with an HEB grocery store on the first floor. The building should be 5 stories tall, inspired by the Austonian's architectural style, featuring sleek, contemporary lines, large glass windows, and a combination of stone and metal materials. Include residential balconies, a luxurious urban aesthetic, and a rooftop terrace. Ensure the HEB store is clearly visible at street level with prominent signage. Render in 4K resolution, 16:9 aspect ratio.