Native 4K or Checkerboard "uprendered" 4k

[SvennoJ]

Chevinator123 said:

Im still a bit confused about the checkerboard thing. What exactly is the pro rendering? Specifically what does "2 1080p frames" equal? What is the equaled res that its upscailing from to 4k?

IM SO DAMN CONFUSED

Imagine a checkerboard, black and white squares alternating.

Frame 1, you render the black squares
Frame 2, you render the white squares

To make a full picture, take the rendered squares, interpolate the non rendered squares using the rendered squares and info from the previous frame when possible.

So basically you render 1920x2160 or 3840x1080 depending on how you look at it. Since the squares are offset each line it's better than interlaced rendering yet still exactly half the number of pixels of 3840x2160.