Unity VR on a single camera with RenderTexture

The project I'm working on used to include the Cardboard plugin to allow our users to control a secondary camera. That camera's position was controlled by the plugin and it used a RenderTexture to draw on to a Quad viewed by the Main Camera.

After migrating to Unity 5 we had the intention of removing this plugin and using Unity VR instead. However from the documentation I've been reading, Unity VR only supports cameras with no RenderTexture and seems to be a global option, affecting all cameras that are not using RenderTexture.

So my question is: Is it possible to use Unity VR on a specific camera that is using RenderTexture? Also, is there a way to turn off stereoscopic rendering on it?

Thanks in advance.

 

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