Metro Exodus - NVIDIA RTX Real-Time Raytracing Demo

Discussion in 'Frontpage news' started by Hilbert Hagedoorn, Mar 23, 2018.

  1. Denial

    Denial Ancient Guru

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    So from what I've been reading, it sounds like DX12 DXR does the raytracing for all these games, regardless to whether it supports RTX or not. DXR works on any GPU but in order to get high quality output, you need an extreme amount of rays, which will bog down modern GPU setups. RTX seems to invoke DXR but with minimal rays then uses one of three different denoisers (depending on the effect) to get a clear image with those minimal rays. That denoiser is specific to Volta - but technically you could DXR Raytrace on any modern GPU. So theoretically, a developer or AMD could do their own denoiser and mimic this idea.. although the algorithm Nvidia is using for RTX seems to take advantage of matrix operations, which is why it runs on Volta's tensor cores. Perhaps a highly optimized FP16 implementation could get similar results.

    It also sounds like the dev gets to control the initial ray output - which is why something like Epic's demo of raytracing was so performance intensive/high quality, while something for Metro is probably using far less rays optimized for a non $60,000 setup lol
     
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  2. Thunk_It

    Thunk_It Master Guru

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    Thank you Hilbert for posting this video. I'm really looking forward to this game, and I appreciate 4A Games for making it!
     
  3. Hilbert Hagedoorn

    Hilbert Hagedoorn Don Vito Corleone Staff Member

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    To be a bit more specific. DX12 DXR Raytracing works on DX12 compatible cards, RTX, however, is a hardware/software layer part of DX12 DXR that only works with Volta and newer cards. So if you see a video listed tagged with NV RTX, it's Volta or newer gen cards responsible for that.
     
  4. tensai28

    tensai28 Maha Guru

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    So does this mean that the game will be supporting this?
     

  5. Keesberenburg

    Keesberenburg Master Guru

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    Yes
     
  6. tensai28

    tensai28 Maha Guru

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    Okay, steam page says that the game is scheduled for release sometime this year. That means we can also expect next gen cards this year? Wonder why Nvidia isn't saying much.
     
  7. cowie

    cowie Ancient Guru

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    yeah early dx9 not even c


    for me I think its just the game or the style it just looks older but it has its moments in some areas.
     
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  8. nz3777

    nz3777 Ancient Guru

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    No way in hell will my 980 be able to play this,on the upside Metro continues to be the Source to blow-up your video card I love it!

    Massive delay on 3-d guru using my mobile phone,which gives Hilbert?
     
  9. SharkyUK

    SharkyUK New Member

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    We're still a long, long, long way away from full raytracing in games. It's great to see this tech coming to current generation cards but, as some have already said, this is the first step of many. There are a lot of hurdles to overcome in the meantime, namely finding a nice way to integrate and harmonise rasterisation and raytracing processes and having sufficient compute performance to make it happen. These demos are only using 1-2 samples per pixel for reflections, shadows and AO which isn't many! Especially when you consider that offline CGI (such as we see in movies) will be using thousands and thousands of samples per pixel. That said, there is some cool denoising technology being developed that produces excellent results from a minimal amount of samples, as we are seeing in the likes of the UE4 raytracing demo. It's just a shame it requires a £90,000 DGX workstation with 4x Tesla V100's to run it at 1080p @ 24fps.
     
  10. sunnyp_343

    sunnyp_343 Master Guru

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    Only water look good.and what happened to shadows inside house.Looks very bad shadows stuff there
     

  11. bigfutus

    bigfutus Master Guru

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    The water looks like garbage, and not only because of the archaic technique, the scale off the ripples is way off.
    But if you find this outdated water good, then you may like this water too.

    youtu.be/f0E5-lDwN90?t=6m53s
     
    Last edited: Mar 26, 2018
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  12. gx-x

    gx-x Maha Guru

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    To be frank, water from 3D Mark looks much better. Especially considering the year of the making...
     
  13. cryohellinc

    cryohellinc Ancient Guru

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    I think the point of this video was to show how RTX works, that's about it. Graphics wise, previous Metro titles have a better picture, so I would assume this either doesn't have all features enabled yet.
     
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  14. SetsunaFZero

    SetsunaFZero Active Member

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    Notice the bad grass physics
     
  15. Andrew LB

    Andrew LB Maha Guru

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    Looks like Ukraine to me.

    [​IMG]
    [​IMG]
     

  16. isidore

    isidore Ancient Guru

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    Wow, terrible. I remember seeing ray tracing rendering years ago in cgi and was like wow, wonder when games will be able to run this. But i'm thinking now that the tech evolved so much with global illumination (and even with some implementations of local illumination ) that the above video looks like years ago.
     
  17. JonasBeckman

    JonasBeckman Ancient Guru

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    If it's RTX and their method of using ray-tracing to enhance certain effects then the difference isn't the lighting. :) That would be some form of global illumination used for that along with physically based materials.

    RTX would be used for the reflections (Water early on in the video.) and the shadows and ambient occlusion. (The interior area later in the video.) From how I understood it at least. :)

    EDIT:
    https://developer.nvidia.com/gameworks-ray-tracing

     
  18. tsunami231

    tsunami231 Ancient Guru

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    impressive looking, but is really 60fps?, and if so what was running on?, I do find it sad that I need to run video at 4k on YT to just get the effect true 1080p in YT though there most likely a night and day diffrence between 4k video on yt vs 4k seen in person
     
  19. oli3

    oli3 Active Member

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    Too much criticism. This looks great, the amount of hard work that people have put into producing this and getting it out there should be recognised.
    I for one and very excited for this to come out and will be supporting it.
     

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