Matte painting in Watercolor Fantasy style, jewel tones: a glass-bottomed boat drifts over a coral reef, luminous sand etched with delicate market chart lines, calm fish weaving through the graphs. Deep sapphire water, emerald coral fans, ruby and amethyst accents, watercolor washes bleeding into paper texture. Rim light traces the boat's edge and fish silhouettes against shadowy depths. Dreamy, opulent, cinematic mood.