At one point you could clearly see day and night on the three views. I don’t see that anymore. Is there a way to turn that back on?
The closest you can get right now is the darkened water for “night” that you see in the terrain example: http://cesium.agi.com/Cesium/Apps/Sandcastle/index.html?src=Terrain.html This will eventually be the default once we have water masks usable from any terrain provider (Kevin can correct me if I’m wrong).
Actual night-lights were removed due to their low-quality and the complexity they added to both the CentralBody shader and the start-up time. We will revisit the issue if it ever becomes a high-priority.
Also, if you are OK with an all night globe, you can use Black Marble - http://cesium.agi.com/Cesium/Apps/Sandcastle/index.html?src=Black%20Marble.html