RED to Alexa LUT Package
This package transforms RED material to closely emulate an ARRI Alexa’s gamma and colorspace – providing an alternative starting point for further grading.
The LUTs are based on an average of actual camera data. Additional grading may still be required to completely match the two cameras in a particular scene. Try out the Interactive Demo.
REDWideGamutRGB / LOG3G10
REDWideGamutRGB / REDlogFilm
ARRI WideGamut / LogC
ARRI FilmMatrix / LogC
*Works with all RED camera models & sensors.
Built with precision and quality control, the LUTs have been thoroughly stress tested and do not introduce any unwanted banding or color artifacts.
The supported input gamma (REDlogFilm or LOG3G10) is mathematically transformed to ARRI’s LogC format. Some highlight rolloff was added to avoid clipping luminance data.
The color information is converted from REDWideGamutRGB to various ARRI formats using our Camera Profiling process. Since REDWideGamutRGB is a standardized colorspace, this LUT package works across all RED camera models.
ARRI Wide Gamut
ARRI Film Matrix
All the LUTs implement a tone-mapping process to retain out-of-gamut colors.
Since firmware version 6.4, the Helium camera’s ISO rating has been increased by +1 Stop. Thus, the LUTs included in the “RED IPP2” folder do not have any additional exposure compensation (compared to their “LEGACY” counterparts).
These LUTs require the footage to be set to REDWideGamutRGB / Log3G10.
For older camera models, the Alexa has generally mapped 18% gray roughly a stop higher at equivalent ISO settings. This difference was compensated for by adding a +1 Stop adjustment to the LUTs in the “LEGACY” folder.
Part of the legacy options also include RED metadata curves, which are able to closely match the contrast of the Rec709 Preview LUT (with the +1 Stop correction), although color information will be inaccurate. These curves can be loaded in-camera for models that do not support 3D LUTs.
The Legacy LUTs support both Log3G10 and the older REDlogFilm gamma curves.
While there are numerous workflow configurations available, here are a couple quick examples for getting started:
2. Apply our “RED_IPP2_to_AlexaV3Rec709” LUT to the camera or LUT box
2. Adjust raw White Balance / Tint / ISO
3. Apply our “RED_IPP2_to_ARRIWideGamut” LUT
5. Use ARRI’s official LogC2Rec709 display LUT
For more detailed information, watch some of the recommended workflows in DaVinci Resolve and RED Cine-X:
You can purchase the LUT package here: http://truecolor.us/downloads/red-to-alexa-lut-package
For any other inquiries about the LUT, please contact us.