Editing 4k footage in 1080p project and rendering in 4k? I edited my 4k footage in a 1080p Premiere Pro project. 

Now If I render the project in 4k, will the 4k clips keep their Quality or will they downscale to 1080?
There is two option at sequence setting. Video and video previews. If the video set 4k, and the video previews set 1080, i shoud not be downscale at rendering.