Employ advanced rendering techniques to generate a hyper-realistic poster design depicting a sloping alleyway in Vienna's Old Town, but avoid overwhelming the artwork with an excessive mix of styles and elements. Ensure that the AI model maintains a coherent and balanced composition, focusing on capturing the essence of the historic district without veering into chaotic or disjointed territory. Strive for accuracy in depicting architectural details and cultural references, while also avoiding overly experimental or distorted perspectives that may detract from the overall aesthetic appeal. Fine-tune the illustration to convey a sense of authenticity and depth, steering clear of generic or clichéd representations. Additionally, refine the artwork to avoid any artificial or unnatural elements, ensuring that the final result remains faithful to the intended vision while adhering to high standards of quality and detail, ugly, deformed, noisy, blurry, distorted, out of focus, bad anatomy, ex