When Arri released the SUP 4.0 firmware for the
ALEXA, they also added the ability to create color 'Looks' to load into the camera. These Look files are similar to scene files found in other cameras, but they aren't burned into the Log C recording of the camera. Instead, they can be used in post by converting them to LUTs using Arri's
LUT Generator. These looks then travel as metadata with the clips recorded (through the XML file). Look files can be created by saving a still from the camera and loading it into the Arri
Look Creator, which can then modify the still and output a look.