日照阴影分析：一日与四季的阴影范围

Create a shadow study diagram for an outdoor space, laid out as a grid of small plans. Show a three-by-three grid of identical site plans, the columns representing three times of day — nine, twelve and three o'clock — and the rows representing three seasons — winter solstice, equinox and summer solstice. Render each plan identically in pale grey with the buildings and tree canopies as solid outlines, and the shadow they cast as a flat dark translucent shape, its length and angle correct for that time and season. Detail the cumulative result in a larger plan beneath the grid, showing areas in permanent shade in a deep tone, areas with partial sun in a mid tone, and areas in full sun left white, with the hours of direct sun labelled in each. Add a small sun path diagram at the side with the three altitudes marked. Keep every frame at the same scale and orientation with a shared legend. Flat technical diagram, white background, no photorealism.