Has anyone had issue with generating sharp cover images? For me it seems the fist cover generated is sharp with no haze or mottling in the background. Then as I progress through different versions the backgrounds darken, text gets fuzzy with a halo and the images also loose edge sharpness. To me it does not look good enough to be a premium book cover. Am I missing something or will the finished book cover be of higher resolution? I have requested the ai to sharpen the text and lighten the images but the results are hardly noticeable.