Nebula Portal Chamber: 3D Cosmic Gateway Render

A hyper-realistic 3D render of a sci-fi portal chamber. A large circular portal set into a matte-black wall, with a chrome rim and glass, runes etched around the circumference. Through the portal roils a vivid nebula in electric blues, magentas, purples and greens, with wisps of dust and distant stars. The chamber's floor and walls are polished obsidian and dark metal, reflecting the portal's glow. Holographic interfaces hover along the walls showing star maps and energy readouts; slender support columns with chrome accents. Volumetric fog, bloom, lens flares, and caustics from the portal create dramatic moody lighting. Perspective from inside the chamber, slightly low, looking toward the portal; depth of field blurs the far walls. Ultra-detailed, photorealistic 3D rendering with cinematic lighting.