Lighting

The most common setup is a dim AmbientLight (to fill in harsh shadows) paired with a strong DirectionalLight (acting as the Sun). Directional lights have parallel rays, so their position only matters for calculating the angle of the light.

PointLights emit light in a sphere around a specific coordinate, like a lightbulb or a fire. SpotLights emit light in a cone, like a flashlight. Both have a distance and decay property, meaning the light weakens as it travels through space.

Lights are mathematically expensive. Adding 50 point lights to a scene will quickly cause framerate drops, especially on mobile. Only use the minimum number of lights needed to achieve your desired look.