The dragon should not be cartoonish or overly stylized. It should look menacing and realistic, but not too scary. The house and the mailbox should not have any significant damage or wear and tear that detracts from their overall appearance. The desert landscape should not have any distracting elements, such as animals or people, that take away from the focus of the image. The color scheme should not be too bright or garish, but rather muted and harmonious to create a more realistic effect. Finally, the image should not look flat or two-dimensional, but rather have depth and dimensionality to create a sense of space and atmosphere., blur haze