Hyper-realistic, epic depiction of a nested world within a world, encapsulated within a crystal-clear glass bowl, rendered with Unreal Engine 5.2 in stunning 8k quality; detailed layers reveal a lush, vibrant ecosystem thriving under iridescent, shimmering domes; the outer world embraces a sprawling landscape of jagged mountains under a star-studded sky; small creative elements like bioluminescent flora and cascading waterfalls bring an otherworldly, ethereal aura, infusing the scene with a vivid tapestry of color and life, emphasizing the delicate balance between nature's vastness and intricate fragility.