by Duke Nukem 3D is one of those games that stays long in the memory, both for players and modders alike. That's particularly evident in the case of developer Brian Schulman, who recently unveiled a path-traced version of the game called Duke-RT. As you might expect, this mod's ray-traced lighting looks incredible, but the Nvidia NRI-based project also integrates upscaling and denoising to ensure the final result looks good and is actually playable on current PC hardware via DirectX 12 or Vulkan.
The core philosophy behind the mod is to preserve the iconic original visual design while integrating those advanced lighting effects. Unlike some RT implementations that can feel overbearing, Duke-RT strikes a careful balance, creating an attractive aesthetic that honours the classic pixel art. By adding new normal-mapped materials, the mod manages to bridge the gap between retro charm and contemporary graphical fidelity.
The result is a dramatic transformation of the game's environment. Real-time lighting, shadows, and reflections are now pervasive throughout the maps, breathing new life into familiar locations. Whether it's buildings reflecting their surroundings, marquee lights casting realistic glows or ambient light panels illuminating interiors, the implementation effectively adds a ton of depth. City-based levels in particular benefit greatly from the treatment, feeling atmospheric and visually cohesive.
While the mod offers support for voxel rendering - an attempt to turn 2D pixel art into actual 3D objects - right now it's hard to recommend. The visuals aren't the issue here - it's performance. Even on a powerful rig with a high-end Intel CPU and RTX 5090 graphics card, we were limited to around 50fps - and frame generation, which might help, is limited to FSR 3 frame generation which isn't the best available. For the time being, playing without voxels provides a smoother experience without sacrificing the mod's core visual improvements.
Getting the best experience out of Duke-RT can require a bit of configuration. The mod works optimally in DX12 mode when paired with Nvidia ray reconstruction, which is essential for reducing visual noise and graininess. You should also expect to spend some time adjusting settings like tone mapping to ensure the colours appear accurate to your tastes. The mod is highly customisable, with plenty of options, so it's worth diving in and experimenting until you get a setup you're happy with.
While the game is fully playable already, development of the Duke-RT mod is ongoing and there are some obvious areas that don't yet have all of the correct physically-based materials to look their best. There are also plans to introduce further enhancements such as improved water, particles and volumetric lighting, for example.
Ultimately, Duke-RT succeeds by enhancing (if that's the right word - purists may argue!) the original experience just enough, providing a fresh perspective on a thirty-year-old staple without losing its identity. It's free to download, so I'd recommend giving it a try.