Unreal 5.5 includes some new features such as the new media holdout system which makes for some very cool AR compositing setups, including have your scene contribute lighting and reflections to your 3d objects.

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In this video, I dive into the exciting new AR compositing features introduced in Unreal Engine 5.5. You'll learn how the new Alpha Holdout material simplifies compositing by eliminating the need for complicated post-process tricks, while allowing live reflections, lighting, and motion blur control on your media meshes. I walk you through setting up a blank project, enabling key plugins like Blackmagic and Live Link, configuring media inputs, and applying the new holdout materials to achieve seamless virtual and real-world integration.

I also demonstrate how to build a simple scene with emissive media materials mapped to the viewport, add geometry to interact with lighting and reflection, and use a cinema camera for realistic effects. This new workflow is much more straightforward than previous methods and brings advanced compositing capabilities into Unreal without compromises. Plus, I discuss the potential future support for translucent materials, which could unlock even more powerful AR compositing possibilities. If you want to level up your Unreal compositing projects, this tutorial is a must-watch.