Please use the troubleshooting below to resolve the following issues with OpenVR Motion Compensation and Sim Racing Studio: 

  • Upgrade button showing for SRS Virtual Tracker
  • SteamVR showing as 'Not Installed' in the Motion Compensation page
  • Critical Error in SteamVR with Sim Racing Studio Motion Compensation
  • OVRMC window is transparent or missing in SteamVR
  • Virtual Tracker not showing in the Steam Status Window
  • Gear Icon for OVRMC is not showing or was showing and is now gone
  • OVRMC or SRS Motion Compensation is Blocked
  • SteamVR crashed and now the HMD only shows a gray screen
  • WitMotion Sensor Calibration (Numbers next to Bullseye in SENSOR are erratic)
  • "Swimming" or "Laggy" Image
  • A thin yellow cross with a green line appears in the VR image randomly
  • Motion Compensation isn't compensating for Yaw, Linear Sway, or Heave
  • Witmotion Sensor is not detected by Sim Racing Studio
  • Witmotion Sensor is not working properly


NOTE: Sim Racing Studio is unable to guarantee support resolution for the experimental feature of motion compensation. If support is needed, join the Sim Racing Studio Motion Compensation Discord channel here. If additional support is required, please book an appointment with the Sim Racing Studio VIP Service here. 



For information on setting up and using OpenVR Motion Compensation and Sim Racing Studio, please use the setup guide here.



Upgrade button showing for the SRS Virtual Tracker

If the drivers needed for Sim Racing Studio are not available or are from an older version of OVRMC, then an Upgrade button will appear next to the SRS Virtual Tracker. Please click the Upgrade button as it will install/update the drivers for the SRS Virtual Tracker to work with OpenVR Motion Compensation. 




SteamVR showing as 'Not Installed' in the Motion Compensation page

The latest beta of Sim Racing Studio fixes the issue of SteamVR showing as not installed when setting up Motion Compensation. You can download the latest beta of Sim Racing Studio from the Latest Beta button in the upper right of the Download page here.




Critical Error in SteamVR with Sim Racing Studio Motion Compensation 
If you are encountering a critical error with SteamVR after the latest SteamVR update (1.23.7) when using SRS Motion Compensation, follow the steps below to troubleshoot the issue.

Reminder: Motion compensation is an experimental Sim Racing Studio feature and might not work if SteamVR or OVRMC stops working. Sim Racing Studio is not responsible for any expenses you incurred related to Motion Compensation feature.

  1. Download and install the Latest Beta of Sim Racing Studio from the Latest Beta button in the upper right of the Downloads page here.
  2. Ensure you have the latest version of OVRMC from here.
  3. Once both Sim Racing Studio and OVRMC are updated or confirmed to be the latest versions, Restart your PC
  4. Once your PC restarts, launch SteamVR
  5. You will likely receive a "Steam has encountered a critical error" message
  6. Select to Restart SteamVR
  7. You will now have a "Some Add-ons Blocked" message once SteamVR restarts
  8. Select "Manage Add-Ons"
  9. You will see the Manage SteamVR Add-Ons window with the message "Due to a recent crash, some SteamVR Add-Ons have been automatically blocked.”
  10. Choose to UNBLOCK 00vrmotioncompensation and simracingstudio
  11. Click the RESTART STEAMVR at the top right once both are unblocked
  12. Once SteamVR reloads, you should now see the OVRMC gear icon in the Virtual Dashboard; however, there will be nothing displayed once you selected it.
  13. Open the SteamVR Settings window
  14. Select Startup / Shutdown
  15. Select CHOOSE STARTUP OVERLAY APPS at the top
  16. Even though VR Motion Compensation shows as ON, turn it OFF once, then turn it back ON again. Note: If you have other SteamVR overlays enabled and SteamVR is still crashing, try turning them Off.  
  17. SteamVR will want to restart, click the RESTART STEAMVR button in the upper right.
  18. OVRMC should now be working properly when you click the Gear icon to turn it on
  19. You might need to adjust the Factor settings in Sim Racing Studio once you launch a game. It’s recommended to follow the “Tuning Motion Compensation” in the Sim Racing Studio Motion Compensation Guide here. 



OVRMC window is transparent or missing in SteamVR

If you do not see the OVRMC main window completely or it looks transparent when launching it from the Gear icon, it is likely due to using the SteamVR Beta version instead of the normal StreamVR version. 


To uninstall the SteamVR Beta:

  1. Open up Steam

  2. Go to your Library

  3. Ensure that Tools is selected in the drop down menu in the upper left

  4. Find SteamVR in the list on the left

  5. Right click SteamVR and select Properties...

  6. Select BETAS

  7. In the drop down field at the top, select None

This will uninstall the Beta and should reinstall the normal SteamVR version.



Virtual Tracker not showing in the Steam Status Window

If you do not see the SRS Virtual Tracker, check to see if there is a ‘simracinstudio’ folder in the SteamVR drivers folder located here: C:\Program Files (x86)\Steam\steamapps\common\SteamVR\drivers

Note: If you have installed Steam in a different location other than the default Program Files (x86) folder, navigate to that location to check if the ‘simracingstudo’ folder is present in the SteamVR\drivers folder. 

If you there is no ‘simracingstudio’ folder located in SteamVR\drivers folder, you will need to manually copy the ‘simracingstudio’ folder from Sim Racing Studio folder here: C:\Program Files\SimRacingStudio 2.0\SteamVR\drivers


Copy the entire ‘simracingstudio’ folder from the SimRacingStudio drivers folder over to the SteamVR\drivers folder. 


Restart SteamVR and check if the SRS Virtual Tracker is now active.



Gear Icon for OVRMC is not showing or was showing and is now gone

If the Gear icon for OVRMC is not showing in the SteamVR Dashboard, check the following: 

    1) In SteamVR, open up Settings. 

    2) Select Startup / Shutdown

    3) At the top, select CHOOSE STARTUP OVERLAY APPS

    4) Once the overlays apps window opens, ensure that VR Motion Compensation is turned On. 

    5) You will need to restart SteamVR once the change is made.

    6) Sometimes OVRMC can become bugged and SteamVR forgets its available even when the button shows as On. To fix the issue, go to Manage SteamVR Add-Ons, turn 00vrmotioncompensation Off, and then turn it back On again. SteamVR will require a restart. Restart SteamVR and the GEAR icon for OVRMC should be available again. 



OVRMC or SRS Motion Compensation is Blocked

If SRS Motion Compensation or OVRMC is Blocked due to a SteamVR crash, SteamVR will list it as a Blocked Add-on as show in the image below:


To unblock SRS Motion Compensation or OVRMC, click on the Manage Add-ons button. This will launch the SteamVR Settings page to manage SteamVR Addo-ons. Any blocked add-ons or any add-on that have been turned Off will appear here. (If you did not select the Manage Add-ons button, you can access the page from the SteamVR Settings menu by selecting "Startup / Shutdown" and then "MANAGE ADD-ONS".) 


Note: OVRMC in SteamVR shows up as 00vrmotioncompensation and SRS Motion Compensation shows as 

simracingstudio. Select the UNBLOCK button next to each one if they are blocked. If one of the add-ons is turned Off, select the On button.


Once the add-ons are unblocked or turned On, you will need to restart SteamVR for the change to take place. 


If SteamVR is not loading and you keep receiving the following error, you must restart your PC. This will allow SteamVR to completely reboot and you should be able to continue.


SteamVR crashed and now the HMD only shows a gray screen

Sometimes if there is a bad imaging crash, even restarting SteamVR or your PC will result in the headset only showing a Gray Screen (this might only happen on Valve Indexes). However, you will be able to still hear the Home Screen in VR with the headset on. In order to fix this issue, right click on the HMD image in the SteamVR window and select to "Restart HMD".  This will reboot only the headset and the regular VR image will return. 



Witmotion Sensor Calibration (Numbers next to Bullseye in SENSOR are erratic)

If you need to reset or calibrate your Witmotion Sensor due to inaccurate readings, please download the 'WITMOTION PC Software ' from https://www.wit-motion.com/. You can find the software located in the Download Center and selecting WITMOTION PC Software (Direct Link: https://www.wit-motion.com/searchq.html. Download the WitMotionNewSoftware.zip and extract the folder onto your PC. Open the folder and run the WitMotion.exe. Note: You must close SRS to connect to Witmotion software and vice versa.

Run the MiniMU.exe file in the downloaded zip folder. You can monitor the output via the tabs at the top of the program. To recalibrate the Witmotion Sensor, select Config from the menu at the top. In the new window, click on each of the 5 buttons in the Calibrate section (Acceleration, Magnetic Field, Reset Height, Angle Reference, and Reset Z-axis Angle. When you select Magnetic Field, select the Start Calibrate button at the bottom and rotate the Witmotion Sensor on all axes as instructed. Once done rotating, select End Calibrate. You can then verify the Witmotion Sensor is now steady in the main window and close the program before you relaunch SRS.




"Swimming" or "Laggy" Image

Note: This guidance is intended for physical trackers for motion compensation. It may or may not work for the Virtual Tracker. Only utilize this guidance if no other troubleshooting works.  The LPF Beta value and DEMA samples is how you can fine tune motion compensation latency to reduce the amount of “swimming” that might appear in the VR image. Set the LPF Beta value and DEMA Samples to the following ‘not filtered’ settings: 
LPF Beta value: 1 
DEMA Samples: 2

Additional tuning could be required to mitigate “swimming” or “laggy” motion compensation. This is done by adjusting the LPF Beta value and DEMA Samples numbers. You can find additional information on adjusting these settings in the OVRMC manual found here. There is also a video explaining adjustments of these settings at the 7:55 mark here. Adjusting the LPF Beta value and DEMA Samples can be trial and error; however, once the settings are producing a good motion compensated image, you will not need to make the adjustments again.



A thin yellow cross with a green line appears in the VR image randomly 

Turn off or disable any other physical trackers you might have running including the HTC Vive Tracker. This can cause a duplicate cross to show up in the VR image that is not utilized by OVRMC. 

If disabling the additional physical tracker doesn't work, the issue could be related to the startdesktopmode.bat file not working correctly. Launch OVRMC from within the SteamVR menu instead to resolve the issue. Use the Launching OVRMC guidance above to do so. 



Motion Compensation isn't compensating for Yaw, Linear Sway, or Heave

Sim Racing Studio Motion Compensation will compensate platform movement on the Pitch, Roll, Sway(Roll), and Surge axis for actuator and non-actuator platforms. Yaw(Tracton Loss), Linear Sway(Double Traction Loss), and Heave are not compensated.  



Witmotion Sensor is not detected by Sim Racing Studio

If the Witmotion Sensor is unable to be detected by Sim Racing Studio, ensure you have any other software that could potentially be blocking its COM Port turned off. This includes the Witmotion Sensor software or other similar programs like SimHub. 

Please also check that the COM Port in the Sim Racing Studio config.ini file has not be hard coded. To do so, close Sim Racing Studio and then open the config.ini file in your ...\Documents\SimRacingStudio 2.0 folder. Scroll down the to [MOTION_COMPENSATION] section and verify the com_port appears as the following. 

com_port = ""

If it doesn't appear as above, please correct it and save the config.ini file. Then reopen Sim Racing Studio and go the the SETUP > Hardware page and and ensure that Motion Compensation (Witmotion) is Enabled and that the Com Port is set to Auto Search. 


If there was a recent Windows Update, it is possible the Windows update over-wrote the Witmotion Sensor's driver. Please check the Windows Update if a fix has been released. In addition, the Witmotion software can be downloaded to verify the driver is installed correctly. Please download their software located at the bottom of the page here. Note: You must close SRS to connect to Witmotion software and vice versa.





Witmotion Sensor is not working properly

If the Witmotion Sensor is not being detected after troubleshooting, is transmitting data to slowly, or providing inaccurate data, then it is likely the Witmotion Sensor cable is defective. Please try replacing the Witmotion Sensor cable to resolve the issue.