To create a reflection of the live scene requires feeding a camera view from six different angles to a Material on an object, such as a screen or water surface. The first way to do this is by creating a Cubemap (which is static) and the other is by creating a RenderToTextureCube (which works in real time). A RenderToTextureCube is an extension from the single surface 2D RenderToTexture asset, which is good for security camera footage and portals.
Open the Content Browser and switch to the Actor Classes tab. Look in the list for Uncategorized | SceneCaptureCubeMapActor (or else uncheck the Show Categories checkbox and look in the list under SceneCaptureActor | SceneCaptureCubeMapActor).
- Highlight this and right-click in the middle of the scene and choose Add SceneCaptureCubeMapActor Here. A big black ball will appear and you'll need to...