GTA 2 RTX Remix mod adds path tracing and widescreen
A modder has used Nvidia's RTX Remix to add full path tracing, dynamic lighting, and 60 FPS frame generation to the 1999 top-down game Grand Theft Auto 2.
Modder gebdag has released GTA2 RTX Remix, an open-source project that brings full path tracing and dynamic time-of-day lighting to the 1999 classic Grand Theft Auto 2. The mod uses Nvidia's RTX Remix framework and a custom Direct3D 9 wrapper to modernize the game's visuals, adding real-time path-traced lighting that makes explosions, car fires, and neon signs cast their own glow. A dynamic day-night cycle shifts the lighting naturally as time passes in the game.
Overcoming legacy graphics barriers
Grand Theft Auto 2 originally ran on the outdated DirectDraw API and an early version of Direct3D. Nvidia's RTX Remix lacks native support for these legacy systems. To bridge this gap, the modder built a custom Direct3D 9 wrapper. This wrapper consists of two DLL files, gta2dx9.dll and gta2dx9_vid.dll, which act as translators. They convert the game's old graphics calls into a format that RTX Remix can read and enhance. The project uses an open-source Direct3D 9 renderer as its foundation. This technical work preserves the original gameplay while completely replacing the aging graphics pipeline.
Widescreen, performance, and accessibility enhancements
The mod unlocks several modern features beyond lighting. It adds widescreen 16:9 support, expanding the visible play area from the original 4:3 aspect ratio. This wider frame changes how players read traffic, police chases, and street layouts. The mod also fixes the pop-in of cars and pedestrians at the screen edges. For performance, it incorporates frame generation technology. This can raise the displayed frame rate up to 60 frames per second, a target the original release could not achieve. Frame generation creates intermediate frames between rendered ones, though it does not remove the rendering cost of the intensive path tracing. Players can control the new dynamic time-of-day system by pressing the F4 key.
Technical requirements and availability
GTA2 RTX Remix is hosted on GitHub under the MIT license. The mod specifically targets the free version 9.6 of Grand Theft Auto 2, which Rockstar Games distributed in 2004. Installation requires downloading the release, unzipping files into the GTA2 folder, running an install.reg registry file, and launching the game's executable. The project depends on users having the correct RTX Remix runtime files, which Nvidia maintains in its own GitHub repository. Players need a 64-bit installation of Windows 10 or Windows 11 to run the mod. The path tracing workload will depend on GPU memory, ray-tracing throughput, and lighting settings. RTX Remix is designed for DirectX 8 and 9 games with fixed-function pipelines, and has been used to mod other older titles like Max Payne and The Elder Scrolls III: Morrowind. GTA2 is considered a demanding test case due to its unusual legacy behavior and fixed top-down camera. Future updates could refine compatibility, expand emissive materials, or add more control over city lighting.
