Uncharted 4 PS4 vs PS4 Pro Screenshot comparison in 1080p

[SvennoJ]

Intrinsic said:

jonathanalis said:

When you downsample a 1440 image to 1080, it losses all the high frequency information, so is basically the same thing as rendering at 1080p, in details. It is what maths from nyquist shannon sampling theorem tells.

The only advantage is on AA.

No, it just doesn't work that way.

The biggest most obvious advantage is AA, but you do end up with a better all round image that shows more detail when downsampled from a higher resolution. Maybe, the reason we see more detail is that with the inherent better  AA we end up with what appears to be a cleaner sharper image. I don't know, but this much is certain, you take a 1440p native render downsampled to a 1080p output screen gives you a better image than a native 1080p render outputting on a 1080p screen. 

The higher you go in pixels from the downsampled target the better your results. When you think of it, every form of AA is in truth supersampling. Basically rendering more pixels than your native render.

I agree, but not every form of AA though. FXAA only blurs edges after the image has already been rendered. Only AA implementations that work while rendering increase detail.
In theory you can render the same quality image without super sampling, yet the easiest way to do that, is by super sampling. There are so many different effect layers nowadays that it's a nightmare to get all the efficient (direct to 1080p) AA techniques to work nice together.