In computer graphics, 3D rendering, and lighting simulation, ambient light refers to environmental illumination coming from all directions. This indirect light fills the scene, creating a base level of brightness. It helps to soften harsh shadows and gives a sense of global illumination.
Ambient lighting in 3D rendering simulates indirect light, contributing to a scene's overall illumination. This technique aids in creating a sense of global illumination and imparts a baseline brightness level to all surfaces in the environment. It's particularly beneficial for filling in shadows and achieving a more uniformly lit scene. Here's an example with ambient light adjusted to maximum intensity.
And with ambient light disabled
The ambient light can be adjusted in the 3D scene from the right-side inspector panel, under the scene section's ambient light subsection. By default, white ambient light is present in the 3D scene.