Masterpiece, 8k, vibrant fantasy landscape painting. A vast valley covered in luminous red flowers leads towards a majestic castle on an island in the sea. A brilliant sun sets behind the castle as a magical beam of light shoots into a dramatic cosmic sky filled with swirling red and teal clouds, stars, and a large textured moon. Epic scale, breathtaking, magical atmosphere, saturated contrasting colors, intricate details, trending on ArtStation,