p2-rtx README

The project's README from github.com/xoxor4d/p2-rtx. As one markdown file: README.md.

Portal 2 RTX Remix Compatibility Mod

This client modification is specifically made for nvidia's rtx-remix.
How does a shader based game work with remix? By manually reimplementing fixed function rendering :)

Description

WIP & Please Note:
RTX Remix was never intented to support Portal 2.
If you encounter crashes, broken things or similar, it's either due to incompatibility,
the limits of fixed function rendering or due to bugs in the compatibility mod itself.

This is not trying to be a remaster.

It simply makes the game compatible with RTX Remix.
Please keep that in mind.



img img


[ Remix Compatibility Features ]

🔹Most things are rendered using the fixed-function pipeline🔹

🔹Remix friendly culling and the ability to manually override culling🔹

🔹Ability to spawn and animate lights on events using a keyframe system🔹

🔹Per map loading of remix config files to set remix variables🔹

🔹Ability to animate remix variables on events🔹

🔹Spawning of unique anchor meshes🔹

🔹DLSS 4.5 (Ray Reconstruction 2) support🔹

🔹DLSS 5.0 (Neural Rendering) support🔹
(Integration made by Sparkles

🔹... and much, much more ...🔹



If you want to support my work:


Installation / Usage


✳️ Info:


⚠️ Troubleshooting (click to expand):

Do I need to start the game via the batch file every time? 
Yes. Asiloaders / dxwrapper will not load if the game is run from steam.


How do I disable remix? 
Run `p2-rtx-disable.bat` and follow the instructions to disable or the mod.  
The game will start afterwards to reset some required cvars.


Crashing, startup issues, not working ..

  • Make sure that you have no clipping software such as "medal" running in the background.

  • If your game is installed within Program Files:
    - right click portal2.exe and click settings - compatibility tab and enable run as admin
    - or install the game somewhere outside Program Files

  • Download and install DirectX End-User Runtimes (June 2010)


Portals not showing up - Game is too dark

Make sure that you installed the base-remix-mod via the installer or manually.
Some maps are not yet touched up, so if you are not rocking an additional community mod (for remix), some maps will be dark and water broken.


No sound
  • Either copy _master.cache from root/portal2/maps/soundcache to root/portal2_dlc3/maps/soundcache
    or paste this into the in-game console and execute: snd_rebuildaudiocache;snd_updateaudiocache;exit


Other Issue?

Look at Closed Issues or Discussions to see if people had similar issues


Credits


img img img img

p2-rtx (xoxor4d/p2-rtx)

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392 ·GitHub
P2-rtx
What is this?This is a mod for Portal 2 that makes the original game compatible with Nvidia's RTX Remix path-tracing framework by manually reimplementing the game's fixed-function rendering pipeline.
Is this a full remaster or just a compatibility layer?It's a client-side compatibility mod, not a remaster: it only reimplements Portal 2's fixed-function rendering so RTX Remix can path-trace the scene correctly.
How do I install and run it?Download the latest release and follow the installer instructions, then always launch the game through the included batch file instead of Steam directly.
What do I need besides the mod itself?You need a copy of Portal 2, Nvidia's RTX Remix runtime, and the DirectX End-User Runtimes (June 2010); releases also ship a custom remix-dxvk build tailored for Portal 2.
What should I expect to break or run slower?Some maps haven't been touched up for Remix lighting and can look dark or have broken water, certain maps suffer CPU bottlenecks from forced software skinning, and sound can disappear until you rebuild the audio cache.
Will this run on Linux, or only Windows?Only Windows — installation involves a Windows batch launcher, DLL hooking via dxwrapper, and Windows-specific steps like running portal2.exe as admin.
Do I need an Nvidia RTX GPU specifically?Yes — the mod only exists to hook Portal 2 into Nvidia's RTX Remix, and it also adds optional DLSS 4.5 Ray Reconstruction and DLSS 5.0 Neural Rendering support.
What rendering features does the compatibility layer add?It adds Remix-friendly culling with manual overrides, a keyframe system for spawning and animating lights on events, per-map Remix config loading, animated Remix variables, and spawning of unique anchor meshes.
How do I turn the mod off if something looks wrong?Run the included p2-rtx-disable.bat, which resets the required cvars and lets Portal 2 start normally again.
Does it support the newest DLSS features?Yes, current releases support DLSS 4.5 Ray Reconstruction and DLSS 5.0 Neural Rendering, with the DLSS5 integration contributed by community member Sparkles.
Is this an official Nvidia release?No, it's a community mod; Nvidia and RTX Remix engineers are credited for support, but the project is made and maintained by the mod author and contributors.
What are similar projects?OptiScaler-DLSSNR-PreSR-Multipass, gta4-rtx, DLSS-NR-on-AMD, dlssg_for_sm86, dlss-unlocked, MFG-Unlocker, DLSS5-Autopilot, DLSS5oneclick
Which topics is it in?rtx, shaders, game-modding, computer-graphics, modding, rendering, game, graphics, gaming, nvidia, cpp, c++
Creator
xoxor4d
Size
615.1 MB
Stars
392
Updated
CommitSep 06Releasev2.5.0Sep 06
Age
1y
Commits · 90 Days