How to rendertarget to framebuffer?

I making the visual field system in our multiplayer game something like RTS,It seems difficult to solve by network,so I want use a SceneCapture2D/SceneCaptureComponent2D instead the Camera/CameraComponent,because the Camera can’t filter out the actor which one can’t be seen by some players,but I don’t know how to retarget it to framebuffer/screen…

I solve it by using post process,but I don’t think that is a good ideal…