Extracting image layers from a multi-channel EXR file sequence in After Effects

Software:
After Effects CC 2018

1. Apply an EXtractoR effect on the layer.
   * Effects > 3D Channel > EXtractoR
2. In the EXtractoR effect parameters, Click the RGB Channels to open the EXtractoR dialog box.
3. Choose the wanted layer from the Layers drop-down, or select individual channels from the B, G, B, Alpha drop-downs.

Note:
The Layer will be displayed darker than the original EXR main layer display because it will not be Gamma corrected (linear display).
A Gamma correction should be applied on the result of the composite via an adjustment layer or ‘pre-comping’ the layers and applying it on the containing composition.
* A Gamma correction can be applied using a Levels effect.
* In most cases the Gamma correction need to be with a value of 2.2 (sRGB).