Thinking about how we have reached the point where a 4K "native quality" output is coming from 1080p internal render resolution either via DLSS 2 Perf mode or looking forward to UE5's Temporal Super Resolution & (we assume) FidelityFX Super Resolution:

Already slightly concerned with the route AMD have chosen for upscaling & await head to heads between UE5's technique & FSR when they're both public. I hope I'm wrong but, as others have noted, the early information shows clear limitations (possibly putting this closer to UE4's upscaler for quality trade-offs). We're no longer in 2017 where any alternative to various checkerboarding techniques would be a major boon on PC.

Going over that old introduction video for DLSS 2.0 at GTC 2020 & thinking about how, in about a year, Epic have gone from the UE4 results (TAAU in the video) to that 4K UE5 beta video & release (with UE TSR). Such an impressive response to nVidia's use of deep learning to basically build a behemoth of TAA upscaling (training the neural net to build heuristics that eg make TAA clamping look like trash).


Some good side-by-side for UE5 TSR vs native res TAA. You can definitely see softer output/detail loss vs native but given the internal res it feels like a generational upgrade over UE4 TAA upscaling. Visible ghosting in spots from both native TAA & TSR, which will make DLSS comparisons interesting, especially as DLSS often presents a sharper/more detailed final image than native res TAA implementations while around the rendering cost of this TSR.

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