Screenshot 1 of 4. Sunset over calm water with a dark stone structure and glowing orange light, rendered with Pyvtron VX.
What Pyvtron VX works with.
| Platform | Java Edition |
|---|---|
| Loaders | Iris |
| Minecraft versions | 1.16, 1.16.5, 1.17.1, 1.18.2, 1.19.4, 1.20.6, 1.21.11 |
Pyvtron VX is a realistic shader pack for Minecraft Java Edition, built for Iris. It pushes atmosphere over subtlety, with volumetric fog, caustics under water and storms that can break into sunlight. The pack is a Java-only shader, so Bedrock cannot run it.
Shader loaders and versions
- Iris: Minecraft 1.16 to 1.21.11.
What it changes
- Volumetric fog, one of the headline features.
- Water caustics and a fancy water texture.
- Extremely realistic rain, with sunlight that sometimes appears while it is still raining.
The "VX" stands for Version X. Pyvtron VX is not path traced, so expect a conventional shader pipeline rather than ray tracing. The creator also documents how to add support for modded dimensions.
How to install Pyvtron VX
- 1.Set up Iris on Fabric or NeoForge.
- 2.Launch the profile and open Options, then Video Settings, then Shader Packs.
- 3.Open the shaderpacks folder and drag the downloaded pack's .zip into it.
- 4.Select Pyvtron VX in the shader list and apply it.
If the pack does not appear or the screen turns black, the shader troubleshooting guide covers the usual causes.
Performance and hardware
The creator rates the performance impact as high, or medium on a good computer. This is not a pack for weak hardware. A graphics card with OpenGL 4.6 or OpenGL 4 support is required, and the creator recommends an Nvidia GPU and an AMD CPU.
Pyvtron VX walkthrough on 1.21.11 with Iris and Sodium
Questions about Pyvtron VX.
4 questions
How do I install Pyvtron VX?
Install Iris, open Options, Video Settings and Shader Packs, then open the shaderpacks folder. Drag the pack's .zip into it, return to the menu and select Pyvtron VX.
Is Pyvtron VX good for low-end PCs?
No. The creator lists the performance impact as high, or medium on a good computer. It also needs a graphics card with OpenGL 4.6 or OpenGL 4 support. Weaker machines should pick a lighter pack.
Does Pyvtron VX work on AMD or Intel graphics?
Unconfirmed. The creator only tests on Nvidia GPUs and says they cannot verify behaviour on Intel or AMD graphics. It may run, but there is no promise, so report problems on the issue tracker if it fails.
Is Pyvtron VX path traced?
No. The creator states that Pyvtron VX is not path traced. The VX in the name means Version X. Its realism comes from effects such as volumetric fog, water caustics and rain rather than ray tracing.
