A 2x2 grid composed of four visually distinct images: A highly detailed portrai

A 2x2 grid composed of four visually distinct images: A highly detailed portrait of a person, focusing on realistic skin textures, subtle facial expressions, and natural lighting. A serene landscape with vibrant colors, showcasing rolling hills, lush green trees, and a majestic mountain range in the background. The sky should have a gradient of blue transitioning to orange at the horizon. A close-up view of a textured surface, such as a fabric weave with intricate patterns and fine details, or a rough stone surface, designed to test the model’s ability to handle noise, grain, and aliasing. A dynamic cityscape at dusk, filled with glowing lights from buildings and vehicles, with a mix of modern skyscrapers and busy streets. Each section should be visually complex, featuring high contrast and vibrant colors, challenging the upscale model's ability to handle different types of visual artifacts and maintain color accuracy.