Without any people
No animals in the scene
Excluding any text or writing
Without any bright colors
No use of specific objects or items (e.g., cars, phones, computers)
Excluding any particular themes or moods (e.g., horror, sadness, violence)
Without any specific weather conditions (e.g., rain, snow, fog)
No specific time of day or season (e.g., daytime, summer)
Excluding any particular style or genre (e.g., cartoon, anime, retro)
Without any specific architectural or environmental elements (e.g., skyscrapers, mountains, beaches)