Lol, is that so important?
Why? I am a poor Japanese in English. Sorry

Since your question has already been solved, can you answer my question?

What I got from the tech interview is that they're using a lot of different techniques to work smarter rather than brute force it with hardware

https://www.eurogamer.net/articles/digitalfoundry-2020-unreal-engine-5-playstation-5-tech-demo-analysis

For example:

For shadows:

In lieu of triangle-based hardware-accelerated ray tracing, the UE5 demo on PlayStation 5 utilises screen-space as seen in current generation games to cover small details, which are then combined with a virtualised shadow map.

For light:

"Lumen uses ray tracing to solve indirect lighting, but not triangle ray tracing," explains Daniel Wright, technical director of graphics at Epic. "Lumen traces rays against a scene representation consisting of signed distance fields, voxels and height fields. As a result, it requires no special ray tracing hardware."

To achieve fully dynamic real-time GI, Lumen has a specific hierarchy. "Lumen uses a combination of different techniques to efficiently trace rays," continues Wright. "Screen-space traces handle tiny details, mesh signed distance field traces handle medium-scale light transfer and voxel traces handle large scale light transfer."

Dunno what they do about reflections, were there any in the demo?


Also for processing geometry, back to software instead of using hardware mesh shaders

"The vast majority of triangles are software rasterised using hyper-optimised compute shaders specifically designed for the advantages we can exploit," explains Brian Karis. "As a result, we've been able to leave hardware rasterisers in the dust at this specific task. Software rasterisation is a core component of Nanite that allows it to achieve what it does. (We can't beat hardware rasterisers in all cases though so we'll use hardware when we've determined it's the faster path.)


This is always a problem with hardware added for specific tasks. Better, smarter ways to handle things usually happen right along. It looks like the next Unreal engine will have all bases covered. (Apart from reflections so far)

Yeah DF guys just mentioned this (about 12,30 mins into their video).
This if 1440p upscaled to 4k, and its running 30fps.

Same demo is going to be 4k@30fps on XSX.

Your question on why Microsoft didn't demonstrate Unreal Engine 5?

They probably did with Hellblade 2. They just didn't focus on the technology itself.

Pretty much! And all to get the bast bang-for-buck visuals with acceptable hardware overhead.

Just irked me that people were claiming the demo wasn't using Ray Tracing -at all- which was actually false.

Reflections were in the demo, but they were on matte surfaces and I think they relied on screen space.

Oh, I see.

However, I think that it is insufficient for the next gen console.
Well, if MS wants to do that, that's fine, isn't it?

Oh Pemalite, why are you keep bringing RT, when i just literally said the demo is not using RT 

If you think next gen consoles will be able to have these kind of graphics on open world games at 4k 60fps with full Ray tracing, you'll be hugely disappointed. This was just a tech demo, most likely ran on a PC.

Demos for the UE4 years ago also looked impressive and we never saw anything like that on ps4 pro or xbox X.

Most likely not a ps5 with only 10teraflops.