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Forza Motorsport: Is 4K 60fps with ray tracing really possible on Series X?


Practically 5 years after the final collection entry, we lastly have some concrete details about the brand new Forza Motorsport coming subsequent 12 months. Whereas the eighth sport within the collection drops the quantity from its title, the presentation was all about numbers: 4K decision and 60fps with real-time ray tracing, double the frame-rate that was proven within the 2020 teaser. Operating video games at 4K 60fps with RT is a tall order even for high-end PCs, so how can this be doable on Xbox Sequence X?

To seek out out, we took a take a look at the 2 teaser trailers launched up to now – which, in line with Microsoft’s weblog, have been shot on PC however ‘additionally examined on Xbox Sequence X for a similar visible high quality output’ – curious.

Analysing the footage reveals a number of tell-tale indicators of optimisations designed to ship the GPU headroom to make RT doable in-game – beginning with decision and picture high quality. Prior Forza Motorsport titles have focused native resolutions with 4x MSAA, however the brand new trailers present aliased geometric edges that are not per multi-sampling. That means that we could also be a less expensive anti-aliasing approach. Equally, the sport would not seem like concentrating on a local 4K, with pixel counts resolving to 1080p in some scenes however 4K in others. There are additionally cases the place just lately revealed objects on display screen have a telltale sample of pixels on them. These indicators could possibly be defined by some stage of picture reconstruction, variable price shading (VRS), or maybe TAA.

Are Flip 10’s Forza Motorsport efficiency claims viable? Alex Battaglia investigates.

These methods make 4K 60fps with RT a extra life like goal, however maybe that 4K should have an asterisk subsequent to it. That is nothing new for the console house, nevertheless it’s positively a novel method for Flip 10 and Forza Motorsport.

The trailers additionally trace in the direction of a few of the settings that the builders could possibly be utilizing to make real-time ray tracing extra inexpensive. I believe that the Flip 10 staff could have chosen a particular sort of RT reflection to maintain computational prices down – particularly, utilizing coherent mirror-like reflections quite than extra delicate and life like shiny reflections. This has an outsized affect on efficiency – in testing the sport Ghost Runner on PC, I discovered that utilizing mirror-like quite than shiny reflections saves 10ms on an RDNA2 graphics card. That is 60 % of the frame-time of a 60fps sport – an enormous quantity. There’s proof of this RT setting getting used within the five-minute trailer, the place supplies exhibit both shiny, mirror-like reflections or no reflections in any respect.

Curiously although, the opposite trailer – the one-minute sizzle reel – seems to be fairly totally different. It boasts numerous diffuse reflections, which Flip 10 just lately confirmed is the results of ray-traced world illumination (and evidently better-quality RT reflections) in replays, the storage and picture mode. That is nice from a technological standpoint, however labelling it as ‘in-game 4K footage’ after we’re speaking about replay cameras feels just a little off when it comes to transparency to the viewers, particularly when the opposite trailer which is based mostly on gameplay constancy exhibits no RTGI and fewer spectacular reflections whereas being labelled in the identical means. It additionally raises the query of the PC model – will these with sufficiently highly effective rigs be capable to allow RT GI and higher-quality RT reflections in correct gameplay as nicely? Hopefully we do not see an arbitrary restriction right here, however that’s what we noticed in Forza Horizon 5, which disabled RT in-game – even when you have the {hardware} to deal with the additional GPU load.

There is a huge development when it comes to track-side element between FM7 and FM 2023.

Past the methods to make 4K 60fps with RT doable, the demo additionally showcases modifications to Forza that look to make the most of the newer {hardware} discovered on PC and Xbox Sequence consoles. One massive change is a dynamic time of day system, which requires the sport to be re-lit in actual time – one thing that may have been an enormous efficiency sink on earlier consoles. Equally, there is a massive enhance to trackside element, with extra spectators, objects and even correct 3D timber with particular person branches and real-time self-shadows. Zooming in to a shot of a street with cones reveals upgrades to the shading mannequin, which displays way more materials variation. Whereas street and cone had the same texture in FM7, every is shaded in a different way now, and the cone’s plastic even features a simulation of subsurface scattering; the thinner areas of the plastic let mild via. Given element variations like this, I’m very interested in how different elements of the sport are detailed and shaded up-close, like crowds or pit crews.

It is clear that there are clear and significant upgrades to picture high quality right here that befit a 2023 tentpole launch, alongside intelligent optimisations that make 4K 60fps with RT reflections conceivable for PC and consoles.

Nonetheless, a number of questions stay concerning the Xbox Sequence model of the sport – does it exhibit related picture high quality and efficiency to the PC model, or are larger compromises required? Equally, the Xbox Sequence S model is particularly described as that includes real-time RT, so what does that seem like and the way does it run? It will be fascinating to see these questions answered as we study extra concerning the sport.





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