Lumen

Name Change

The name AetherRT has been changed to Lumen.

Hardware ray tracing for Minecraft Java Edition 26.3 (Fabric).

Lumen is a hardware-accelerated ray tracing mod built around a Vulkan-native rendering architecture, with NVIDIA DLSS Ray Reconstruction, Frame Generation, Multi Frame Generation and Reflex support.

No manual setup needed: Lumen starts Minecraft on Vulkan automatically, even if your game is set to OpenGL by default.

Ray tracing can be enabled or disabled instantly while in-game, without restarting Minecraft or leaving and re-entering the world.

Lumen is currently in Alpha. Expect bugs, visual issues, performance regressions, and breaking changes between versions.

Features

• Real-time in-game Ray Tracing toggle (Keybind: None by default)
• Distant Horizons support
  • Using the Distant Horizons Seedgen mod alongside it is recommended.

NVIDIA

• DLSS Super Resolution
• DLSS Ray Reconstruction
• DLSS Frame Generation
• DLSS Multi Frame Generation
• Reflex

Requirements

• Minecraft Java Edition 26.3
• Fabric Loader and Fabric API
• A supported NVIDIA RTX GPU with Vulkan Ray Tracing support
• Recommended minimum VRAM: 8 GB
• Up-to-date NVIDIA GPU drivers

Current Limitations

• Lumen is currently an Alpha release.
• AMD and Intel reconstruction paths are not currently available.
• Compatibility with other rendering mods is not guaranteed.

Note: When enabling or disabling ray tracing, or changing DLSS / Frame Generation settings, Minecraft may freeze for a few seconds while the renderer is reconfigured. This is expected, please wait for it to complete.

Disclaimer

Lumen is an independent project and is not affiliated with, endorsed by, or sponsored by Mojang Studios, Microsoft, NVIDIA Corporation, or Khronos Group.

Minecraft and related trademarks are property of Mojang Studios and Microsoft.

NVIDIA, GeForce, RTX, DLSS, Reflex, NGX, and related names and trademarks are property of NVIDIA Corporation.