In this unreal engine 5 tutorial, learn how to create a transparent curtain material in Unreal Engine 5.4 to transform your scenes with Lumen lighting. You can follow along with Unreal Engine 5.3, 5.2 or 5.1 also.
https://dev.epicgames.com/community/learning/tutorials/1J3V/creating-a-photorealistic-curtain-in-unreal-engine-5