Lights and sky
Use Light Cells for authored lights. Set the sky and environment from the World controls. Test the scene from the gameplay camera as well as the editor view. A light that helps editing may not fit the game's mood.
Lighting settings
Settings exposes experimental lighting methods and related quality, shadow, cache, and debug controls. Legacy lighting remains the default. These controls are available for inspection and testing. Their presence does not mean every method is complete or suitable for a shipped game.
Change lights during Play
Use supported Light and Cell properties for temporary changes. See the Cell and Light reference.