Tag Archive: Calibration

  1. Sample ICC Profiles

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    Part of our Basic Calibration service, ICC Profiles are used to apply calibration data at the computer’s operating system level, ensuring consistency across all applications.

    During Windows & Mac calibration, it is important to load a NULL ICC Profile to remove any color adjustments the computer may have added to the display.

    We have also included a Sample ICC Profile (using a generic color transform) to visually verify that the ICC Profiles are loading correctly.

    Learn how to install ICC Profiles: Windows | Mac.

    Display Calibration ICC Profile

  2. Installing ICC Profiles (Mac)

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    Our Basic Calibration service supports Mac OS X 10.6.8 or later. The following tutorial shows how to load a display calibration ICC Profile using the Mac. View the Windows version.

    Download the Sample ICC Profiles.

    Mac OS X 10.6.8+

    Default ICC Profile Location: /Library/ColorSync/Profiles/Displays

    Note: Some third-party apps (like screen dimming) will need to be disabled before loading a new ICC Profile (or else the computer will need to be restarted afterwards for the changes to take effect).

    Step 1: ColorSync Utility

    Press Command + Spacebar to open spotlight (default shortcut). Type “ColorSync Utility” and open the application.

    Mac Spotlight ColorSync Utility

    Step 2: Apply ICC Profile

    Go to the “Devices” tab and select your display. Under “Current Profile”, select “Other”.

    Mac ColorSync Utility

    Locate the ICC Profile and select it.

    Mac ICC Profile

    Step 3: Login Screen

    Note: This is an optional step to load the ICC Profile to the computer’s login screen.

    Press Command + Spacebar to open spotlight (default shortcut). Type “Directory Utility” and open the application.

    Mac Spotlight Directory Utility

    Unlock the application using your administrator’s password.

    Mac Directory Utility

    Select Edit > “Enable Root User”. Create a new password for the root account.

    Mac Directory Utility Root User

    Switch users and log in as “Other”. Type in “root” as the username and enter your newly created password.

    Mac Login Screen Root User

    Repeat Steps 1-2 and apply the ICC Profile in the root account, then log out.

    Back in your regular user account, open the “Directory Utility” application again and unlock it.

    Finally, select Edit > “Disable Root User”.

    Mac Directory Utility Disable Root User

    Learn how to install ICC Profiles on Windows.


    For any questions or inquiries, please contact us.

  3. Installing ICC Profiles (Windows)

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    Our Basic Calibration service supports Windows 7 or later. The following tutorial shows how to load a display calibration ICC Profile using Windows. View the Mac version.

    Download the Sample ICC Profiles.

    Windows 7+

    Default ICC Profile Location: C:\Windows\system32\spool\drivers\color

    Note: Currently with a multi-display setup, the screen mode must be set to extended (not duplicated) for the ICC Profiles to load. See Step 4.

    Step 1: Color Management

    In the start menu, type “Color Management”, then open the application.

    Windows ICC Calibration

    Step 2: Enable Calibration

    Note: This step is only required once during initial setup.

    Click on the “Advanced” tab, then click “Change system defaults”.

    Windows ICC Calibration Settings

    In the new pop-up window click on the “Advanced” tab, then check the box “Use Windows display calibration”. Finally, close the window.

    Windows ICC Advanced Calibration Settings

    Step 3: Apply ICC Profile

    Under the “Devices” tab, select the desired display. Make sure “Use my settings for this device” is checked, then click “Add”.

    Windows ICC Profile Settings

    In the pop-up window, click “Browse” and locate the ICC Profile.

    Windows ICC Profile

    Select the ICC Profile in the list and click “Set as Default Profile”.

    Default Windows ICC Profile

    Step 4: Multiple Displays

    To enable ICC Profiles for multiple displays, right-click on the desktop and choose “Display settings”. Scroll down to “Multiple displays” and set it to “Extend these displays”.

    Windows Multiple Displays Extended ICC Profile

    Learn how to install ICC Profiles on a Mac.


    For any questions or inquiries, please contact us.

  4. RED to Alexa LUT Package

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    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.

    RED to Alexa LUT Package Chart v2.0

    *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 Log3G10 gamma curve is mathematically transformed to ARRI’s LogC format. Some highlight rolloff was added to avoid clipping luminance data. This serves as the base for all other colorspace conversions.


    The color information is transformed from REDWideGamutRGB to a variety of ARRI formats using our Camera Profiling process. Since REDWideGamutRGB is a standardized colorspace, this LUT package works across all RED camera models.

    All the LUTs implement a tone-mapping process to retain out-of-gamut colors.

    RED to Alexa LUT Gamut Tone Mapping

    ARRI WideGamut

    This is the foundation for all other colorspace transforms. The wide gamut colorspace provides the most room for color grading and image manipulation. This is usually combined with ARRI’s standard LogC2Rec709 transform.

    RED to Alexa LUT ARRI Wide Gamut

    ARRI FilmMatrix

    An option using ARRI’s Film Matrix is included as well. This was originally built for the Alexa to mimic the color characteristics of film from an ARRI scanner. Ideal for a traditional film workflow involving a separate Print Film Emulation LUT.

    RED to Alexa LUT ARRI Film Matrix


    Intended for dailies and in-camera previewing, the LUT is based on combining our “ARRIWideGamut” LUT with the ARRI LUT Generator’s standard LogC to Rec709 transform curve, but has been re-built to better roll-off the saturation on RED footage.

    RED to Alexa LUT Rec709 Preview


    This transform is for use as a “Creative 3D LUT” in conjunction with RED’s new IPP2 system. When used with our recommended settings, the result is designed to look similar to our “AlexaV3Rec709” LUT.
    IPP2 settings: Medium Contrast / Soft Rolloff.

    RED to Alexa LUT IPP2

    Post Workflow

    Based on a traditional log workflow, grading should be applied after the TRUECOLOR LUT, but before the output Display LUT.

    RED to Alexa LUT Workflow

    Also watch some of the recommended workflows using RED Cine-X and DaVinci Resolve:


    The following video shows how our LUT compares to an actual ARRI Alexa under various lighting conditions. RED’s default IPP2 settings are also shown for reference (Medium Contrast & Medium Rolloff).

    Our goal was to match each shot as closely as possible by only adjusting the White Balance, Tint, and Exposure settings. Better results could be obtained through the use of secondary color corrections.

    More details about the camera settings are available in the PDF.


    You can purchase the LUT package here: https://truecolor.us/downloads/red-to-alexa-lut-package

    For any other inquiries about the LUT, please contact us.