RenderSettings.ambientIntensity

Description

Multiplier for the ambient light that Unity generates from the skybox.

Unity scales the ambient light only when RenderSettings.ambientMode is AmbientMode.Skybox and the scene has a skybox material. Scenes you create while the Editor default behavior mode is set to 2D have no skybox material, so the multiplier has no effect in those scenes. In the other ambient modes, Unity reads the ambient colors directly, so changing this value has no effect.

The following example sets the ambient mode to skybox and then doubles the ambient light the skybox contributes.

using UnityEngine;
using UnityEngine.Rendering;

public class Example : MonoBehaviour
{
    void Start()
    {
        RenderSettings.ambientMode = AmbientMode.Skybox;

        // Change this value to make the skybox lighting brighter or dimmer.
        RenderSettings.ambientIntensity = 2.0f;
    }
}