Generate an enchanting and surreal depiction of a world locked in perpetual twilight. Picture a captivating landscape where the boundaries between day and night blur into an everlasting twilight. The sky should be a mesmerizing blend of deep blues and soft purples, with a faint, ethereal glow on the horizon. Show a mystical terrain, featuring delicate, bioluminescent flora and fauna that illuminate the landscape with gentle, otherworldly radiance. Add a crystal-clear river meandering through the forest, reflecting the twilight colors. Focus on intricate details and realism to create an image that transports viewers to this captivating twilight realm. Ultra-high resolution, 8k, vibrant colors.