Passthrough Troubleshooting

• Ensure that you have both Passthrough Enabled enabled and Anti-Aliasing method set to MSAA in your project’s settings. Refer to the Configure Unreal Project documentation.
• If you have configured your Passthrough Layer Shape as an underlay, the application (VR) may cover the Passthrough layer completely. Ensure that the alpha channel is greater than 0 in some framebuffer regions. Refer to the Compositing and Masking and UOculusXRPassthroughLayerBase documentation.

• Ensure you’ve assigned it a Surface Geometry. Refer to the Projected Passthrough Tutorial documentation. If you wish to render Passthrough on the whole screen use a Reconstructed Passthrough Layer Shape instead.
• Ensure Allow CPUAccess is enabled on your mesh. Refer to the Projected Passthrough Tutorial documentation, steps 6 & 7 of Create a Solid Plane.

• Ensure you’re using Vulkan preview mode.
• If you don’t wish to use Vulkan preview mode, make a new material with its blend mode set to AlphaHoldout. Note: This material will not work when rendered over opaque objects.