Modders rejoice! Bringing ray tracing to PC gaming classics just got way easier

YouTube YouTube
Watch On

Nvidia announced that part of its free RTX Remix open source modding platform is available for download starting today. RTX Remix runtime will let modders quickly dive into their favorite classic DirectX 8 and DirectX 9 PC games and easily add modern lighting and textures to existing game assets in a way that saves a lot of time and effort. 

The RTX Remix runtime lets a modder capture a game scene and then replace assets in real-time while "injecting RTX technology," like path tracing, DLSS 3, Nvidia Reflex, and AI-enhanced textures into a game. The remastered assets can then be exported to various developer apps like Unreal Engine, Blender, and Nvidia's Omniverse apps.

The complete capabilities of the Remix runtime feature are listed here. Some other things you'll be able to do: add VR support, change camera positions to make a first-person game into an isometric game, or "modernize the fluid simulation to render smoke and fire with realistic volumetrics." Which is dev speak for 'cooler fire and smoke effects.'

This open source release of the RTX Remix runtime isn't the full package, however, as the current release only allows for making tweaks to the existing assets within a gameworld. Soon, Nvidia will release the RTX Remix Creator Toolkit, and that's the part of the modding package that will allow you to bring whole new assets into a game and use AI to upscale any existing assets, too.

The RTX Remix Creator Toolkit, according to Nvidia, "allows modders to assign new assets and lights within their remastered scene and use AI tools to rebuild the look of any asset." The toolkit isn't out yet, but releasing soon.

The video above shows you how it works in a game like The Elder Scrolls 3: Morrowind. The results are impressive and almost make it look like a new game. At the press of a button, RTX Remix could pull in all the assets from this dining room area, where pristine lighting and AI-enhanced textures were then added back in. 

All of the enhancements in the recently released Portal With RTX were done using the full RTX Remix package, giving the 15-year-old game a fresh facelift. Nvidia said that these tools would make modding more accessible to the average gamer. But it's the RTX Remix runtime pulled from Portal that modders have been using to drop ray tracing into a host of other games, from Roblox to World of Warcraft.

Nvidia is now making that runtime more freely available to make it more easily added to other games, and more easily tweaked to make it play nicely with older titles.

The RTX Remix runtime source code can be downloaded on GitHub starting today, with Creator Toolkit following soon. For more information about getting your RTX Remix mod project started, Nvidia set up a Discord server where you can talk to Remix engineers for tips. 

Best CPU for gamingBest gaming motherboardBest graphics cardBest SSD for gaming


Best CPU for gaming: Top chips from Intel and AMD
Best gaming motherboard: The right boards
Best graphics card: Your perfect pixel-pusher awaits
Best SSD for gaming: Get into the game first

TOPICS
Jorge Jimenez
Hardware writer, Human Pop-Tart

Jorge is a hardware writer from the enchanted lands of New Jersey. When he's not filling the office with the smell of Pop-Tarts, he's reviewing all sorts of gaming hardware, from laptops with the latest mobile GPUs to gaming chairs with built-in back massagers. He's been covering games and tech for over ten years and has written for Dualshockers, WCCFtech, Tom's Guide, and a bunch of other places on the world wide web. 

With contributions from
Read more
A screenshot taken from the 2025 Nvidia tech demo Zorah
I've been testing Nvidia's new Neural Texture Compression toolkit and the impressive results could be good news for game install sizes
Cyberpunk upscaling
New modder tool makes it easier than ever to swap AMD's FSR 4 scaling for Nvidia's DLSS or Intel's XeSS and vice versa
A screenshot taken from the 2025 Nvidia tech demo Zorah
Nvidia RTX 50-series and dev kit show that rasterization is old news and we're now firmly in the era of AI rendering
Nvidia RTX 5080 Founders Edition graphics card from different angles
Nvidia's latest 572.16 driver isn't just for the RTX 50-series, as 20, 30 and 40-series cards are also gifted with significant updates
Dark Messiah duel
Dark Messiah of Might and Magic gets co-op mode and extra content thanks to the mod community's collaboration with Ubisoft: 'To see it all come together has been very emotional for us'
Doomslayer pointing a gun at demons while giants fight in the background
Ray tracing is quickly becoming inescapable and I think it's time we bit the bullet and embraced it
Latest in Graphics Cards
Sapphire Pulse Radeon RX 9070 XT on a red and orange background
Some Sapphire RX 9070/9070 XT graphics cards have hard-to-spot foam inside that must be removed or it 'may result in a decrease in cooling capacity or product failure'
The PCIe slot on an Asus ROG Strix B850-F Gaming WiFi motherboard, showing the Q-release latch for GPUs.
Gigabyte seemingly mocks Asus' recent Q-release debacle with a video swapping out an RTX 5070 Ti 100 times
Cyberpunk upscaling
New modder tool makes it easier than ever to swap AMD's FSR 4 scaling for Nvidia's DLSS or Intel's XeSS and vice versa
Nvidia RTX 4060 Ti graphics card
Specs for Nvidia's new RTX 5050, 5060, and 5060 Ti GPUs leak out and that 5060 might actually be half decent. If it's priced right
Nvidia RTX 5080 Founders Edition graphics card from different angles
Nvidia says it really has sorted RTX 50-series black screen issues this time around as yet another driver fix finds its way to release
AMD RX 7900 XT with its original packaging.
AMD clawed back 7% graphics market share from Nvidia at the end of 2024, but the outlook for the whole industry in 2025 looks iffy
Latest in News
Marvel Rivals Human Torch
Marvel Rivals is carrying on the tradition of chaotic patches after buffing two of the most annoying heroes, but I main one of them, so I'm not complaining
 photo shows a factory tool that places lids on data center system-on-chips at an Intel fab in Chandler, Arizona, in December 2023. In February 2024, Intel Corporation launched Intel Foundry as the world’s first systems foundry for the AI era, delivering leadership in technology, resiliency and sustainability.
So, wait, now TSMC is supposedly pitching a joint venture with Nvidia, AMD and Broadcom to run Intel's ailing chip fabs?
Monster Hunter Wilds Artian weapon crafting - Gemma holding hot metal
Gemma's English VA is right with us on Monster Hunter Wild's confusing menus, which makes me feel a little better for having to Google symbols all the time
Sapphire Pulse Radeon RX 9070 XT on a red and orange background
Some Sapphire RX 9070/9070 XT graphics cards have hard-to-spot foam inside that must be removed or it 'may result in a decrease in cooling capacity or product failure'
Promotional image of the HP Envy Inspire inkjet printer
Haunted printers turning on by themselves and printing nonsense has to be one of my favorite Windows 11 bugs ever
The UHPILCL water cooled gaming laptop
This water-cooled gaming laptop packs a full-size desktop RTX 5090 and even fits in a backpack, but I sure wouldn't want it in mine