No bright or vibrant colors.
Avoid a cheerful or happy atmosphere.
Do not make it overly realistic.
Exclude any elements of a peaceful or serene environment.
Avoid using a high-key lighting setup.
Do not create a minimalist or abstract style.
Avoid overly saturated colors.
Exclude any cheerful or joyful characters.
Do not use a soft focus or blurry effect.
Avoid a cartoon or caricature style.