under ground crystal cave system, giant shards infinitely regressing, every surface a reflection of the whole, liquid silver, light blues and sea green, geometric shapes, large colums and clusters of crystal, a human exploring, epic landscape, highly detailed, high quality, 8 k, 4 k, octane render, digital painting, alena aenami, lilia alvarado, shinji aramaki, karol bak, alphonse mucha, tom bagshaw 