cave inside a mossy red granite canyon filled with brilliant precious stones, geodes, diamonds, emeralds, ruby, Gem, Mineral & Fossil, waterfalls, pooling, 5 atmospheric, cinematic, high detail, 4K, detailed by Jean-Honore Fragonard, river waterfall, mushrooms and fireflies, by marc simonetti, natural volumetric lighting, realistic 4k octane beautifully detailed render, 4k post-processing