poster frame mockup city street scene urban life vibrant greenery empty benches poster frame mockup city street scene urban life vibrant greenery empty benches bustling city lush plants sidewalk view generative ai rgb editable psd 4k resolution urban landscape street photography cityscape design mockup template urban greenery street benches city windows urban trees street lights city sidewalk urban buildings city pedestrians street mockup urban design city life urban environment street view city atmosphere urban setting city architecture street elements urban photography city mockup urban template city scene street design urban vibe city background urban mockup city template street atmosphere urban backdrop city design street life