Tie a Scene Capture 2D to player camera

The answer to this question https://answers.unrealengine.com/questions/120180/creating-a-mirror-using-scene-capture-2d-actor.html mentions a scene capture 2D tied to the players camera.

I want to capture the output from the camera and write it to a texture for use later on in the post processing pipeline. Using the method in the above answer do I end up rendering the scene twice or is it actually possible to capture the rendering output in this way before it is destroyed?

In case there is an alternative option I want access to the rendered scene in a post process material 2nd (and later) blend stage when it no longer seems to be available in the SceneTexture:PostProcessInput0.

Regards,

Phil

This is question is a duplicate of https://answers.unrealengine.com/questions/130993/tie-a-scene-capture-2d-to-player-camera.html

The Answer can be found at that location.

Thank You

Eric Ketchum