In this tutorial, I’ll show you a method of how to output a custom render pass inside Unreal Engine 5.1. Such as cryptomatte, normals, z-depth (world depth), motion vectors, AO, world position, lighting, reflection, etc.
Movie Render Queue supports rendering different types of output images in separate passes, such as the final image, object ids, and other rendering related passes. Each render pass setting will output your movie in a separate rendering mode. You can then use them in an external post-production or compositing program of choice.
https://dev.epicgames.com/community/learning/tutorials/waxm/unreal-engine-ue-render-custom-multi-channels