---
title: SlimeVR
weight: 250
---

# SlimeVR

- [SlimeVR Documentation](https://docs.slimevr.dev/)
- [SlimeVR on Linux guide](https://docs.slimevr.dev/tools/linux-installation.html)

> SlimeVR is a set of open hardware sensors and open source software that facilitates full-body tracking (FBT) in virtual reality.

SlimeVR is an open source IMU based full body tracking system. Being open source it has Linux support and there are a few variants you can either buy or build yourself.

You can pre-order the official SlimeVR trackers from [their crowdsupply page](https://www.crowdsupply.com/slimevr/slimevr-full-body-tracker), but at the time of writing this if you order them right now you'd need to wait approximately 4 months for your orders to ship, due to the very high demand driven by low cost and good quality tracking compared to other solutions.

## Assembling

Alternatively you can build it on your own, and you have a few variants to choose from:

- [Official SlimeVR DIY builders guide](https://docs.slimevr.dev/diy/index.html)
- [Frozen Slimes V2](https://github.com/frosty6742/frozen-slimes-v2)
  - while a bit bigger, Frozen Slimes V2 tend to be cheaper and a lot easier to build, being approachable even for people that are inexperienced with soldering

It's generally **highly recommended** to opt for the more expensive but higher quality [BNO085](https://shop.slimevr.dev/products/slimevr-imu-module-bno085) IMU module. This should offer the highest quality tracking with best precision and minimal drifting.

## Installing SlimeVR Server

<!-- will likely need to move this somewhere else -->

- [AppImage](https://github.com/SlimeVR/SlimeVR-Server/releases/latest/download/SlimeVR-amd64.appimage)
- [Flathub](https://flathub.org/apps/dev.slimevr.SlimeVR)

## Selecting your variant

There are currently three ways to use SlimeVR:

- Via SteamVR driver
- Via SolarXR driver for Monado
- Directly via VRChat OSC (Open Sound Control)

## First method: SteamVR driver

Download the [SlimeVR driver for SteamVR](https://github.com/SlimeVR/SlimeVR-OpenVR-Driver/releases/latest/download/slimevr-openvr-driver-x64-linux.zip), extract it and place the `slimevr` folder in the `$HOME/.steam/steam/steamapps/common/SteamVR/drivers/` folder. This path may change depending on where your SteamVR install is located. To make sure you moved the right folder, make sure that the following path exists: `$HOME/.steam/steam/steamapps/common/SteamVR/drivers/slimevr/bin/linux64/driver_slimevr.so`.

Then you'll need to register the driver using the following command.

**Important**: make sure to **NOT** run this command twice, adding a driver twice will cause problems.

```bash
$HOME/.steam/steam/steamapps/common/SteamVR/bin/linux64/vrpathreg.sh adddriver $HOME/.steam/steam/steamapps/common/SteamVR/drivers/slimevr
```

Now the only thing you have to do is restart the SlimeVR server.

## Second method: native SolarXR driver for Monado

This is a native approach to using Slime trackers within the open-source stack without relying on SteamVR, offering results comparable to those provided by the native SteamVR driver.

To use this method, you need to use SlimeVR v0.14.0 or newer and if not available from stable may be obtained via a testing build:
[Official stable builds](https://github.com/SlimeVR/SlimeVR-Server/releases)
[Unstable testing builds](https://github.com/SlimeVR/SlimeVR-Server/actions/workflows/gradle.yaml?query=branch%3Amain)

For Monado, you need compile this fork:
`https://gitlab.freedesktop.org/rcelyte/monado.git`, branch `solarxr-integration`. You can easily build Monado from this specific branch via [Envision](../fossvr/envision/), by modifying "XR Service Repo" and "XR Service Branch" in your build profile accordingly.

**Important**: Make sure to launch SlimeVR first before launching Monado/Envision.

**Important note #1**: Do not stop the SlimeVR server during operation, as driver and tracker hot-plugging are not yet supported.

## Third method: VRChat OSC

**This method is only available in VRChat.**

It requires fewer steps to configure and allows the use of the full FOSS stack without using SteamVR. For now, it is less accurate due to OSC limitations. [More information here.](https://docs.slimevr.dev/server/osc-information.html)

- Step 1: Tick the checkbox in SlimeVR settings -> VRChat OSC Trackers -> Enable

![Configuration steps of VRChat OSC](vrchat_osc.png "Configuring VRChat OSC")

- Step 2: Start VRChat

- Step 3: Go to the radial menu, and enable OSC:

- Step 4: Calibrate your trackers via built-in SlimeVR configuration wizard (Mounting and body proportions)

<!-- Image resourced from https://docs.slimevr.dev/server/osc-information.html -->

![How to enable OSC in Radial Menu](radial_menu.png)

- Step 5: Press the "Full Reset" button while standing straight

![Full reset button in SlimeVR menu](full_reset.png)

- Step 6: Go to VRChat settings and press "Calibrate FBT" in "Quick actions".

!["Calibrate FBT" button in VRChat Quick Actions menu](quick_actions.png)

- Step 7: [T-pose](https://en.wikipedia.org/wiki/T-pose) yourself and submit your calibration via pressing triggers on both sides.

Done! From now on, you should be able to freely move your tracked limbs.
