serene 3d clouds glide in pastel, celestial sky, merging flawlessly, creating a tranquil atmosphere. abstract 3d

abstract 3d background ethereal clouds floating dreamy colored sky blending smoothly one another heavenly mesmerizing delicate magical tinted merging graceful whimsical vivid melding surreal ambiance serene pastel celestial flawlessly tranquil atmosphere view drift seamless hover harmonious glide create scene ai generated