A dark cobalt cloud mass rises over a green mountain lake, with one broad sunlit rim glowing orange-gold along its upper edge. The lake and a low forested shoreline form the grounding structure, reflecting the warm cloud rim as a long broken path of light. Keep the foreground simple with dark stones and calm water. Use deep cobalt, forest green, charcoal, warm orange-gold, and cool silver reflections. The scene should feel powerful but clean, with the cloud as the single atmospheric actor and the shoreline establishing scale. Render as a refined atmospheric oil painting with academic realism, dense cloud volume, controlled value hierarchy, and excellent atmosphere-ground coupling.