Unreal Engine 4 (UE4) is a popular game engine developed by Epic Games that is used to create games for PC, console, mobile, and virtual reality. It is a powerful tool for both experienced game developers and newcomers alike. UE4 offers a wide range of features, including advanced rendering, physics, animation, networking, and more. In addition, it includes a comprehensive suite of tools and tutorials for creating 3D environments. UE4 is also compatible with popular external development tools such as Unity and Autodesk Maya. As for unreal engine 5 (UE5), it is the newest version of Unreal Engine, released in 2021. It aims to provide improved graphics, better lighting effects, and more realistic physics. UE5 also features improved animation tools and better support for virtual reality. For tutorials on how to use UE4, there are many available online, such as video tutorials, written tutorials, and forums to ask questions. Additionally, many tutorials are available on how to open and close doors in UE4.

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