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Anyone excited by RTX?

category: general [glöplog]
 
I'm sure everyone has seen it by now but if you haven't, the NVIDIA RTX demos are out and they are amazing:

https://www.youtube.com/watch?v=jkhBlmKtEAk

This got me super excited about people using this tech in demos. Is anyone planning to use RTX in a PC demo once the cards come out?

I see some marching, perfectly reflective cubes in our future.
I sense raytraced ”copperbars” incoming. I hope people will use it for something interesting.
added on the 2018-05-02 16:44:46 by Preacher Preacher
Not really, too exclusive in both the hardware and software department for me.

If you're into perfectly reflective cubes you came to the right neighbourhood though, pretty much every 4k compo since around 2006 has at least one intro featuring those.
added on the 2018-05-02 16:48:31 by LJ LJ
Meh, already doing realtime path tracing.
added on the 2018-05-02 17:18:02 by psonice psonice
Quote:
I sense raytraced ”copperbars” incoming. I hope people will use it for something interesting.


Of course... I mean having it in hardware for you has to win you something. Maybe lots and lots of real time perfectly reflective cubes?

Gee, I don't even know what the practical limits are these days.
So is it a new fixed function pipeline or something?
added on the 2018-05-02 19:38:02 by yzi yzi
I plan to try it out as soon as I can. As for demos I can see it being attractive only if you already have a demo engine written against DX12. I think the amount of work required to write a brand new demo engine specifically for DX12 is not worth the chance to use raytracing. You may as well write your own raytracing code and get the much greater benefit of being able to hand-optimize the code for a specific demo.
added on the 2018-05-02 19:47:20 by fizzer fizzer
RTX is an nvidia gameworks component on top of DXR (direct-x ray tracing) providing:
Quote:
turnkey libraries for area shadows, glossy reflections, and ambient occlusion

Read more over at Anandtech
added on the 2018-05-02 19:47:26 by LJ LJ
Well according to this, DXR is the one that runs on top of RTX.

Is anyone using Gameworks to make demos?
added on the 2018-05-02 20:03:29 by fizzer fizzer
Ah i see only the "turnkey" solutions are part of gameworks, should've payed more attention.

(nice how that accidentally broken link causes anandtechs asp server to choke lol,
fixed link)
added on the 2018-05-02 20:34:19 by LJ LJ
nvidia is going to make my meaningless dumb work in my free time more meaningless and i don't like that
meh
I haven't really looked into DXR, but as I see it the tracing isn't the difficulty, it's the geometry. Storing a static mesh in a form suitable for tracing and rendering it is ok, but if it's an animated mesh? Especially if it's a big, detailed animated mesh. That's the problem that needs solving.
added on the 2018-05-03 09:30:39 by psonice psonice
Quote:
RTX is an nvidia gameworks component on top of DXR (direct-x ray tracing) providing:
Quote:
turnkey libraries for area shadows, glossy reflections, and ambient occlusion

Read more over at Anandtech


Ah interesting I didn't see that. That's disappointing. I was hoping there was just going to be a RAYTRACEMENOWBABY method added to DX12/OpenGL.
Quote:
I haven't really looked into DXR, but as I see it the tracing isn't the difficulty, it's the geometry. Storing a static mesh in a form suitable for tracing and rendering it is ok, but if it's an animated mesh? Especially if it's a big, detailed animated mesh. That's the problem that needs solving.


Latest BVH's have been doing a relatively good work in that regard, though. You can have a moderately dynamic ray-traced scene these days in real-time. Now, Global Illumination is still a huge problem, worse than updating geometry, imho.
added on the 2018-05-03 19:42:42 by imerso imerso
Forgot to add: while I believe that DXR/RTX is a nice step forward, I don't see them as revolutionary. I agree that the videos are awesome, but the best ones used 4 Titan V GPUs at once, with all that power to spare, honestly and with all respect I can do real-time path-tracing as well. =)
added on the 2018-05-03 19:44:54 by imerso imerso
Correcting myself: maybe they are revolutionary, but for providing an API and making it all accessible by the mass. Not by providing truly real-time path-tracing today. At least not yet.
added on the 2018-05-03 19:50:24 by imerso imerso
I can't see GI being a problem with 4 Titan Vs tbh :D
added on the 2018-05-03 20:09:16 by psonice psonice
Quote:
Forgot to add: while I believe that DXR/RTX is a nice step forward, I don't see them as revolutionary. I agree that the videos are awesome, but the best ones used 4 Titan V GPUs at once, with all that power to spare, honestly and with all respect I can do real-time path-tracing as well. =)


Wait... those were on Titans? That's a little misleading to say the least. They made it *sound* like something that could be done on consumer level cards. Not "consumer of datacenter racks" cards.

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