system
Given the following post, respond as if you're commenting on Reddit:
human
[General] If I was living in a Dyson Sphere or on a Ringworld and looked up during a darkness cycle what would the observable night sky look like?
gpt
Depends on the mechanism used for the darkness cycle, the habitation density of the structure, and what exactly you're looking at. 

With THE Ring World, directly above would likely be a black square that appears somewhat like a square lunar eclipse. To the sides of the panel, you're still likely to see stars off to the sides, and may be able to make out other light-cycle bands along the ring its self. If the ring is extremely densely inhabited, you may be able to make out extremely large population centers as small stars along the ring structure its self. They'd have to be EXCEPTIONALLY large, mind you, and no modern city is going to cast enough light to be viewable across the ring. 

One of the day-night cycles i've seen proposed for a Dyson Sphere are 2 quarter-spheres that rotate around the central star. Because of the area you're dealing with, they would cast a shadow on where you're standing, making it 'night', but you should still be able to see the areas of the sphere that are in their day cycle if you look up. To an extent, anyway. Cloud cover, locally and on other sections of the interior sphere, are going to obscure your view, likely making day-cycle sections look like a sort of murky grey-green.