Cave of Luminescent Realms: Digital Fantasy

An expansive subterranean cave in a magical realm, rendered in lush digital art. The walls glitter with bioluminescent crystals and moss, casting emerald, indigo, and magenta glows. A clear underground river runs through the chamber, its surface reflecting neon light from floating orbs and translucent fungi. Intricate runes shimmer along stalactites while wisps drift in the air. In the distance, a crystalline arch frames a portal to a starry astral landscape. The scene blends high fantasy with digital illustration, featuring cinematic lighting, deep textures, and surreal, dreamlike atmosphere. Ultra-detailed, 3D-like rendering with soft bloom and prism reflections.