When you create a realtime visualization in Unreal Engine, you'll typically need to rely on content that you create in separate third-party applications and import into your project using the tools provided in the Unreal Editor. For example, these types of content typically include 3D geometry (called Static Meshes in Unreal Engine), Textures, Materials, audio files, and so on.
The topics in this section of the documentation describe how to get these types of content and more into Unreal Engine.