No MSAA in main display view - any solutions?

Hey everyone!
I'm working on a game that uses the OpenVR interface for the HTC Vive. I want to achieve two things:

• Allow spectators to view the ingame action on a TV screen
• Capture the first person view output in full hd for videos

Since the default configuration will only give me a low-resolution screen regardless of the build settings, my solution is to add an additional camera to the camera rig and set Target Eye to None (Main Display).

This allows me...

No MSAA in main display view - any solutions?