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How to add custom LUTs in Radiant Photo

  • Updated

We know how important it is to have access to your favorite LUTs when editing, so here’s the good news:

We're already working on adding official support for importing custom LUTs directly through the Radiant Photo interface. It's on our roadmap, and we’re excited to bring that functionality to you in the future.

In the meantime, if you’d like to use your own LUTs right now, there’s a manual workaround you can try. 

Note: This method isn’t part of the standard workflow, and we can’t guarantee it will work on all systems.

What You’ll Need

  • File type: Must be a .cube file (lowercase extension: .cube).
  • Format: Iridias/Adobe-compatible. You can create this in Photoshop via: File > Export > Color Lookup Tables
  • Size: Should be set to 16. Use this online tool to convert if needed: color.io free online LUT converter
  • File name: Avoid special characters like &, @, %, etc.

Step-by-Step Instructions

1. Locate the LOOKs Folder on Your Computer

Radiant Photo 2:

  • Windows: %appdata%\Radiant Imaging Labs\Radiant Photo 2\Looks\Output
  • macOS: ~/Library/Application Support/Radiant Imaging Labs 2/Radiant Photo/Looks/Output

Radiant Photo 1:

  • Windows: %appdata%\Radiant Imaging Labs\Radiant Photo\Looks\Output
  • macOS: ~/Library/Application Support/Radiant Imaging Labs/Radiant Photo/Looks/Output

Open one of the folders with the default Looks, and examine it. You'll need to recreate the organization of this folder on your end. 
 

2. Create a Custom LUT Folder

  • Create a new folder for your custom LUT pack.
  • Add your .cube files to it. We recommend no more than 30 LUTs per folder.
  • Copy the localize.xml file from one of the default folders (in step 1) and paste it into your new folder.

3. Edit the localize.xml File

Open the file in a text editor and update it to match your LUT filenames and display names. Here’s an example:

<looks>
  <group>
      <names>
          <name lang="en">NAME OF THE LOOK PACK</name>
      </names>
      <look>
          <filename>NAME OF THE FIRST LUT FILE (exactly as it's displayed in your folder).cube</filename>
          <order>1</order>
          <names>
              <name lang="en">NAME THAT WILL BE DISPLAYED IN RADIANT</name>
          </names>
      </look>
      <look>
          <filename>NAME OF THE SECOND LUT FILE (exactly as it's displayed in your folder).cube</filename>
          <order>2</order>
          <names>
              <name lang="en">NAME THAT WILL BE DISPLAYED IN RADIANT</name>
          </names>
      </look>
 </group>
</looks>

You can customize it for more LUTs, just copy and paste the <look>.....</look> section once more.

 </group> </looks> should always be the last part of the code. All additional LUTs info (<look>.....</look>) should be pasted above it.

 

4. Add the Folder Back

Copy your custom folder into the same Output directory you accessed in Step 1.

5. Launch Radiant Photo

Open Radiant Photo and go to the Color Grading tool. Your custom LUTs should now appear as a new LOOK pack. Refer to this article on how to locate the Looks in Radiant Photo.

Final Tips

  • Make sure the .cube file names match exactly with what's in your localize.xml.
  • Keep file names simple to avoid issues.
  • If the LOOK pack doesn’t show up, restart the app and double-check your folder structure.

 

We’re looking forward to delivering full support for custom LUTs right inside the app – stay tuned!

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