这种大场面最怕出成明信片，一眼就腻。折腾了几版之后发现关键不在颜色多艳，而在冷暖分家：山脊吃到第一缕暖光，谷底老老实实留在冷蓝影子里，中间靠一层薄雾把纵深拉开。再在谷底塞一条反光的河，尺度感立刻就有了。
提示词补全了一版：
Sunrise over the Grand Canyon, layered red and orange rock formations glowing in first light, ridgelines catching warm rim light while canyon floors stay in cool blue shadow, thin morning haze filling the depth between buttes, a winding river far below catching a sliver of reflection, high vantage point overlooking a vast drop, scattered clouds lit from beneath, epic scale, wide angle 20mm, high dynamic range with natural contrast, crisp sandstone texture and erosion detail, cinematic landscape photograph
广角别开太大，太大了岩层会被压扁，反而没气势。