WF_CDL is an implementation of the ASC-CDL (American Society of Cinematographers, Color Decision List), a format for colour interoperability between systems. The Lustre implementation is more for dailies workflow, this one is more for VFX and offline grading. Colour correction for VFX has to be done on the grading system, but most of the time you want to keep it as metadata, that’s what WF_CDL does.

Make sure every other colour correction is bypassed in Lustre and just the viewing LUT is kept. On the other system you will communicate with you will have to make sure you use a compatible viewing, for example if you use a Kodak2383 preview for log footage on a DCI projector on Lustre, you will have to have a LUT to match Kodak2383 on the VFX machine’s display.

Create a colour correction with the parameters:
- Slope is behaving like Gain in linear architecture
- Offset is behaving like Brightness in log architecture
- Power is behaving (almost) like a gamma control on a regular colour corrector

Then, click on Save button to export the XML data file, you can browse to the shot folder.
On the other side, the compositor can Load the shot and put the CDL file in a CDL processing node, such as the CDL Spark that come with Autodesk Flame and Smoke, that can be enabled for viewing and kept independent from the viewing LUT.

On a offline grading workflow the DoP can prepare ideas and looks on a CDL enabled product such as IRIDAS SpeedGrade and then load them in the session to be used as starting points for the grading.

Create 2D LUT and Create 3D LUT export LUTs to be used in non CDL compatible application. For example they can be put in a 3D LUT processing node in a batch processing view. 3D LUT can also be loaded into a video processing device such as Blackmagic HD Link Pro for previewing or dailies. Finally, 3D LUT can be used by Lustre as input LUT for cameras with non-natural looking output such as the Thomson GVG Viper in Filmstream mode.

On the right, Use Sec button and Secondary slider are to use the same layouts as in the Colour menu. Invert is inverting the secondary, it’s independent from the Lustre invert buttons in Keyer and Geometry. Mask Opacity is also independent from the Opacity parameter in Lustre.

Documentation button will open this document.

Reset Button reset the Plugin parameters.

WF Online button will open the Workflowers website.