ProEXR File Description

=Attributes=
channels (chlist)
comments (string): “created with mental ray 3.13.1.10”
compression (compression): Zip
dataWindow (box2i): [0, 0, 4095, 4095]
displayWindow (box2i): [0, 0, 4095, 4095]
lineOrder (lineOrder): Increasing Y
pixelAspectRatio (float): 1
screenWindowCenter (v2f): [0, 0]
screenWindowWidth (float): 1
type (string): “scanlineimage”

=Channels=
A (half)
B (half)
G (half)
R (half)