Screenshot 1 of 5. Sandstone-style village street with lanterns, hanging laundry and soft shader lighting, rendered with Dirt RT.
What Dirt RT works with.
| Platform | Java Edition |
|---|---|
| Loaders | Fabric |
| Minecraft versions | 26.2 |
Dirt RT is a real-time path tracing shader pack for Java, made by sjrsjz for Vulkanite on Fabric. It targets 26.2 and swaps conventional lighting for multi-bounce ray tracing, physically based materials and heavy denoising. Think of it as a dirt rt shader setup that demands serious hardware.
Loaders and versions
- Fabric: Minecraft 26.2. The newest build needs no dependencies.
What it renders
- Multi-bounce path tracing for direct and indirect light, with a sparse radiance cache and path guiding.
- GGX reflections, rough diffuse shading, transmission, volumetric absorption and emissive materials.
- Unified diffuse and specular denoising with temporal reprojection, variance tracking and six-stage A-Trous filtering.
- LabPBR materials, parallax occlusion mapping, wet surfaces, automatic exposure, bloom and tone mapping.
- Diagnostic views for lighting, history, variance, geometry and cache state.
Setting it up
Dirt RT is a shader pack, not a standalone mod, so Fabric comes first. If you have not set it up, follow the Fabric install guide, then add the pack in these steps.
- 1.Install Fabric Loader 0.19.3 for 26.2.
- 2.Install Vulkanite modified 26.2-v0.0.6-lut, or a compatible source build.
- 3.Place the Dirt RT folder in the shaderpacks directory.
- 4.Enable Dirt RT in the shader-pack menu.
- 5.Load a LabPBR resource pack.
Launch problems
If launch fails with a strange memory or stack overflow, add `-Dorg.lwjgl.system.stackSize=1024` to your JVM options. The trade-off is plain: this is a narrow, high-end pack, and it will not suit modest graphics cards. For a different kind of image-making tool, see Exposure.
Questions about Dirt RT.
3 questions
What GPU does Dirt RT need?
Dirt RT needs a compatible NVIDIA RTX GPU. The creator warns it needs a high-performance card, naming the RTX 4060 and 4070 as the kind of hardware to aim for.
Does Dirt RT need a resource pack?
Yes. Dirt RT requires a LabPBR resource pack to be loaded, alongside the Vulkanite 26.2 branch, for the shader to work correctly.
How do I fix a memory or stack overflow when launching with Dirt RT?
Add `-Dorg.lwjgl.system.stackSize=1024` to your JVM options in the launcher profile, then start again. The creator suggests this when launch fails with an odd memory or stack overflow.
