Thanks Art,
I have just upscaled all the backgrounds to 4k, so they are better quality now.
I am going to make a new 4k UI skin aswell! Also I've been playing around with Hal and it seems that 4K backgrounds work fine with
4K heads and 8K full body characters.
I did try to make an invisible skin by masking everything with hot pink, the only problem was that is masks the character out aswell.