What is the main reason for manually generating lights in a darker scene?

The most relevant reason for manually generating lights in a darker scene is to improve player experience by enhancing visibility. When a scene is dark, it can be challenging for players to navigate or appreciate the game's environment. By strategically placing and generating lights, developers can illuminate pathways, highlight important objects or areas, and create an engaging atmosphere that enhances gameplay.

While adjusting graphics settings or ensuring proper asset imports is important for overall game quality, these actions do not specifically address the immediate issue of darkness in a scene. Turning off Auto Generate in lighting settings is related to the efficiency of lighting processes, but it does not directly resolve the need for improved visibility necessary for a better player experience. Therefore, focusing on enhancing player visibility through manually placed lights is the primary goal in this scenario.