The Indirect Lighting Controller is a Volume component that allows you to globally control the intensity of baked or precomputed indirect lighting.
The Indirect Lighting Controller has two properties:
| Property | Description |
|---|---|
| Indirect Diffuse Intensity | A multiplier for baked and realtime Global Illumination lightmaps and Light Probes. HDRP multiplies the lightmap and Light Probe data by this value. |
| Indirect Specular Intensity | A multiplier for baked, realtime, and custom Reflection Probes. HDRP multiplies the Reflection Probe data by this value. |
This component override is useful in situations where you need to animate your lighting globally.
An example of a useful situation of where an Indirect Lighting Controller would be useful is when your Camera is in a dark area and you want to light the area suddenly. To create this effect with this override:
- Create a Scene Settings GameObject (menu: GameObject > Rendering > Scene Settings) and add an Indirect Lighting Controller (click on the Scene Settings GameObject and then, in the Volume component in the Inspector, click Add component overrides and select Indirect Lighting Controller).
- Add a Collider to the Scene Settings GameObject and enable the Is Trigger checkbox. Set the Size of the Collider to be the size of the area you want to change the indirect lighting for.
- In the Indirect Lighting Controller, set the Indirect Diffuse Intensity and Indirect Specular Intensity to 0. This dims all indirect lighting to black.
- When you light the area, animate (using Timeline or an Animation) the Volume's Weight property to transition from 1 to 0. This will progressively interpolate between the values set inside the Volume and the values from other Volumes that affect your Camera.
- As a result, the Indirect lighting globally fades in. Alter the length of the animation to speed up or slow down the fade.