藍調時段

Use Blue Hour lighting: the sun has just set and stays outside frame. Soft cool twilight from the existing sky illuminates the courtyard and character, with layered blue-violet sky luminance and readable darker ground. Switch on the existing left wall lantern only, adding a small localized warm pool on its adjacent wall and steps, against the broad cool ambient light. Keep all original cloud contours and positions exactly; recolor their illumination only. Preserve Ruk's red, cream and teal base colors under the cool light; do not monochromatically paint everything blue. Treat the selected baseline sky as a locked painted plate: preserve exactly every existing light cloud silhouette, tiny wisp, gap and blue-sky boundary, including the sparse upper-right wisps. No new dark cloud, elongated streak, haze shape or sky texture. Apply dusk color and exposure to the existing painted shapes only.