Ultra-realistic digital illustration of a panoramic view in a dark underground cavern abundant with large, colorful crystal formations inspired by Greg Rutkowski and Thomas Kinkade. The scene showcases vibrant, detailed, and smooth crystals, gems, and geodes set against the darkness. Rich mineral deposits reflect cinematic high contrast and HDR quality, captured in 4K resolution. The atmosphere is magical and hyperrealistic, featuring captivating bokeh and depth of field effects. Selected regions glow with vivid hues, creating a stunning interplay of light and shadow within the cavern's mysterious depths.