Loss of quality of a Paper2d on a fixed camera

I am doing a 2d space shooter wit a fixed camera. But when a move the character a see a loss of quality. When I tried with the camera following the character , it just looked fine. I tried to turn off all the poss processing , blur option, even changing the engine scalability , but it did not solve the problem. Could someone shed some light on this problem?

Thanks

Is the camera in orthographic mode?

Yes, it is orthographic. Sorry to take so long to answer.