Light sculpture

Hearthside is a tidally locked world, meaning the sun is frozen in the same place in the sky, with its elevation determined by latitude. This lack of movement makes it easier to incorporate sunlight into art and architecture.

Hearthside is famous for light sculpture, which uses reflected, refracted, filtered, or diffracted sunlight in interesting ways.

One of the more common examples of light sculpture is a dark room with a single skylight. Placed in the path of incoming sunlight is a surface covered in tiny mirrors that may be stationary, moving, or may even have several parts that move relative to one another, reflecting tiny patches of sunlight onto surrounding surfaces. These mirrors may be colored, and prisms may be used instead of mirrors to create a rainbow effect.

While humans instantly recognize this as an analog to a disco ball, this is the main attraction rather than a bit of ambience.

Such dark rooms are meant to give people a break from the endless bright daytime outside.