Centaur Concept Art on an Alien World

Ultra-detailed sci-fi concept art of a centaur standing on an alien planet. The centaur has a muscular humanoid upper body and a horse-like lower body, with iridescent blue-green skin and glowing bioluminescent veins. He wears segmented rune-lit armor and a crystal saddle, and wields a crystalline spear planted in the ground. The landscape features jagged obsidian rocks, bioluminescent moss, and towering glass-like crystals. The sky is a violet-teal gradient with two moons and faint ring shadows, while distant mountains glow softly. A warm sunset casts orange-pink light across the scene, contrasted by cool blue shadows, with volumetric fog and drifting motes of light. The composition is cinematic concept art, painterly textures, high detail, suitable for an 8k digital painting.