actually it is not possible -> THIS](://ft.trillian.im/efa6257197fce847ff12c38f511516cb45fa16b0/6sxaavh9WAJUi4WzCpWAdAv2PXt5K.jpg) is not a mirror. its a live camera footage broadcasted on a screen. check the youtube above, thats a mirror, and that is Unreal Engine 3. the SceneCaptureReflectActor is missing and its not possible to do without the missing actor. thus something like window or mirror is impossible to render realistically. and i wonder why is it missing? im sure it wont be a big deal to implement the actor from udk that should be there in the first place. its an absolute essential feature