De Mic

Hey guys, I have been playing DCS for a while and really want to start streaming when I am flying in VR, the problem I have is with the Rift S there is a really bad fisheye on the capture which is unpleasant to my viewers. How can I get rid of this? I have tried upscaling the screen and things like that but I can never seem to get rid of the fisheye effect. Ideally, I would like DCS to open up on full screen as it would when I was playing with Track Ir. Any tips would be greatly appreciated.