A Tiny Rain Cloud in a Blue Teacup

Generate exactly one finished image, never a collage, grid, or multiple variants. A photoreal conceptual still life: one cobalt ceramic teacup on warm ivory plaster contains a tiny perfectly formed white rain cloud, releasing fine rain only into the cup. Grounded cup, soft real shadows, visible ceramic pinholes, side lighting from left, lots of empty space, no other objects or text. Vertical 3:4. Original visual concept, carefully resolved composition and materials. No watermark. Text-to-image only; do not use previous conversation images as visual inputs.