Please create a 3D cave interior filled with mystical atmosphere. The cave walls and ceiling should be embedded with glowing crystals that emit soft, colorful light. Ancient hieroglyphs and symbolic drawings should be carved into the walls, suggesting forgotten cosmic knowledge. The space should feel sacred and mysterious, with a slightly dark tone and subtle energy particles floating in the air. The overall environment must complement a sarcophagus made of extraterrestrial material, enhancing its presence as the focal point.