A thundercloud building over a flat green plain on a summer afternoon, timelapse: a small brilliant WHITE cumulus puff swelling upward, its sunlit cauliflower top bubbling and boiling in bright white and cream, towering higher into a huge white cumulonimbus with only the base turning blue-grey, the top flattening into a wide white anvil by the final second, its shadow darkening the fields below. It is a natural weather cloud of water vapour, bright and white in the sun — NOT smoke, NOT a fire, NOT an explosion, nothing rising from the ground. The ground and the horizon stay fixed in the bottom 1/6 of the frame. Static locked-off camera. No text
