Passthrough Color LUT Tutorial

Deprecation notice: This tutorial uses the OculusXRPassthroughLayerComponent approach with a CameraActor and Level Blueprint. This pattern is deprecated as of Unreal Engine 5.6. For new projects, use the persistent passthrough workflow instead. See the Persistent Passthrough documentation for the recommended approach.

1. Clone the Passthrough sample project⁠ repository. The project uses Git LFS, so run git lfs install before cloning:

   git lfs install
   git clone https://github.com/oculus-samples/Unreal-PassthroughSample.git
   
2. In the cloned repository, locate and copy the following files into your Basic Passthrough Tutorial project’s Content folder:
   • InvertedColors_LUT.uasset from Content/Passthrough/Blueprints/ColorLUTs/
   • inverted_lut.uasset from Content/Passthrough/Materials/Textures/

1. Open the Basic Passthrough Tutorial project.
2. Double-click to edit InvertedColors_LUT.uasset and set Lut Texture to inverted_lut.uasset.
3. Return to the main scene window.
4. On the World Outliner tab, select CameraActor.
5. Click Blueprint on the toolbar and click Open Level Blueprint.
6. Right-click on the Blueprint editor and click Create a Reference to CameraActor.
7. Get the PassthroughLayer from the CameraActor, and then access the Stereo Layer Shape from it.
8. Enable Color Map.
9. Set Color Map to Color LUT.
10. Set Color LUTSource to InvertedColors_LUT.
11. Your Level Blueprint should look like this:

1. Connect your Meta Quest headset and run the project.
2. Put on the headset to test the passthrough window. You should see a small window of passthrough surrounded by a larger opaque field.