Raytracing for TDM: DoomRTX

[Bikerdude]

DoomRTX - 
 

https://www.dsogaming.com/news/we-may-be-one-step-closer-to-a-doom-3-path-tracing-mod/

https://github.com/jmarshall23/DoomRTX

[jaxa]

Article:

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Sadly, though, this game uses OpenGL, and RTX Remix has a lot of trouble overhauling those games. However, we may be one step closer to a Path Tracing Mod as Justin Marshall was able to implement DX12 and DXR to the official level editor of Doom 3.

Commenters:

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I haven't looked into the specifics on why he chose to add a DX12 renderer, but maybe just going with Vulkan would have made more sense here, since RTX Remix itself uses DXVK internally to render those older games with added path-tracing anyway.

Plus I remember seeing that NVIDIA was looking into how to get OpenGL games to play nicely with RTX Remix as well, but no idea how far they got there right now.

 

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RTX Remix has worked with DOOM 3 for awhile API is basically a suggestion now, everyone’s been reverse engineering their games to work with Remix

Thoughts on OpenGL, Vulkan, and DirectX 12?

[lowenz]

DX12 portings of ID4 are already good enough: Release RBDOOM-3-BFG 1.6.0: Retro Revolution and Modding Mastery · RobertBeckebans/RBDOOM-3-BFG · GitHub

Edited May 6 by lowenz

[lowenz]

 

[datiswous]

Video looks kind of choppy

[I.C.H.I.]

Yeah, pretty bad showcase... And if you look closely the image is like a badly compressed JPEG. No idea what's up with that. Some bad reconstruction used in the process or something?

[Arcturus]

Looks like it's running in low resolution.

[Bikerdude]

21 hours ago, lowenz said:

 

nice but ugh, the dev needs to smooth out his mouse control for the love of god..

[taffernicus]

quite imprssive on doomedit 

As it happens, I’m currently experimenting with Doomedit, and there are plenty of tutorials out there (even though they all date back to the 2000s).

[Bikerdude]

i wonder how hard it would be to add this to TDM and DR..?

[revelator]

Hmm to bad MH is no longer active with the quake community, he was the one who ported idtech 1 to directx 9 so he might have some idea how hard it would be.

doing it in vulkan might actually be easier i reckon ?.

[chakkman]

Wouldn't this add a ton of system requirements to TDM?

I never played a game with Raytracing, which wasn't a complete ressource hog.

[revelator]

it would be slower thats for sure but how much ?.

the Doom3 game is pretty old so maybe not so much, one could get an idea of the overhead by trying out DoomRTX.

funny when it came out control was a pretty nasty experience on cards of that time and only the biggest beefiest nvidia card like the 2080 ti could run it decently. nowadays i can run it with all bells and whistles on at 4k and still get <> 75 fps on my rtx 3070.

so it might not run to bad .

[chakkman]

I have no idea about the technical side of RTX, but, the games I tried (Quake 2 and Portal RTX) performed like absolute garbage.

I guess it depends on how you solve things, but...

[Bikerdude]

6 hours ago, chakkman said:

Wouldn't this add a ton of system requirements to TDM

Only if its NOT toggleable.

[revelator]

as i understand it performance degredation depends on how many hops a raycaster has to go through ?.

so a performance hit can atleast be developer controlled to some degree.

the question is will it preserve the feel of the game as well as provide more natural lighting / reflections without sacrificing to much ?.