How to show object in sceneCapture2d, while object is invisible to camera?

Hi,

I’m trying to make something similar as shown in the link below : (Batman VR)

Working on VR game, I want to keep character head invisible to camera, but want to show that in mirror (sceneCapture2d)
What I’ve done so far is, made a dummy sphere as character head, set it to ‘invisible in game’, I’m getting shadow of head (enabling cast shadow from hidden objects) by this trick, without showing head in camera.

Problem: “I want to show character head in mirror”, for this purpose I’m using sceneCapture2d as mirror.
with above trick, character head (sphere) is not showing in mirror too.

(problem snapshot)
https://drive.google.com/open?id=0B54SzICUIPMLbXFxalZTc0hnek0

Any sort of help will be appereciated.

Thanks