Demonstrates light estimation information from the camera frame. You should see values for "Brightness", "Color Temp", and "Color Correct" on screen. Most devices only support a subset of these 3, so some will be listed as "unavailable."
### BasicLightEstimation
Demonstrates basic light estimation information from the camera frame. You should see values for "Ambient Intensity" and "Ambient Color" on screen.
This sample also attempts to read HDR lighting information. On iOS, this is only available when face tracking is enabled and requires a device with a TrueDepth camera (such as an iPhone X, XS or 11). When available, a virtual arrow appears in front of the camera which indicates the estimated main light direction. The virtual light direction is also updated, so that virtual content appears to be lit from the direction of the real light source.
### HDRLightEstimation
This sample attempts to read HDR lighting information. You should see values for "Main Light Direction", "Main Light Intensity Lumens", "Main Light Color", and "Spherical Harmonics". Most devices only support a subset of these 4, so some will be listed as "unavailable."
On iOS, this is only available when face tracking is enabled and requires a device with a TrueDepth camera (such as an iPhone X, XS or 11). When available, a virtual arrow appears in front of the camera which indicates the estimated main light direction. The virtual light direction is also updated, so that virtual content appears to be lit from the direction of the real light source.
The relevant scripts are on the "Directional Light" GameObject.
The relevant scripts are on the "Directional Light" GameObject, including the [`LightEstimation.cs`](https://github.com/Unity-Technologies/arfoundation-samples/blob/master/Assets/Scripts/LightEstimation.cs) script.
Shan Jiang