> ## Documentation Index
> Fetch the complete documentation index at: https://liv-creators.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Minimizing Playspace Drift with Quest Standalone and Lighthouse Tracking

When connecting your Quest device to your PC and having a Tracked camera, you'll eventually encounter drift.  It's unavoidable but here's some tips to reduce the effects and frequency of occurrence.

##  Quest device, specifically Quest 3

* Good lighting throughout filming area
* Lots of tracking points for headset - no plain walls. If on a green/blue screen, create unique shapes with appropriately colored tape on any plain walls/floor/ceiling
* Handle headset with care; don’t cover cameras with hands, clothing
* Don’t let headset turn off or sleep, under any circumstance, as Quest re-establishes the playspace coordinates each time it turns on
* Set Quest playspace center and direction with Meta/Oculus button **once** in Quest home environment at start of session, and <u>never press it again</u>.
* Set guardian boundaries well beyond filming area, so that headset can never leave it during session
* Check floor height and adjust in Quest settings if necessary. Recommend setting floor height approx. 10mm above real world floor. \
  There’s 2 reasons for this; it helps in some edge cases solving foreground issues and have minimal issues when interacting with objects near the floor.
* Set headset to the longest possible sleep interval.
* Cover proximity sensor between lenses with Blu-Tack to ensure the headset remains on when not being worn
* Keep headset moving and tracking room throughout session. Headset will still sleep and reset playspace center if it stops moving for even a short period of time.
* Use Quest Pro controllers, which are self-tracking, instead of standard Quest 3 controllers which require constant line-of-sight to the headset, and are generally less accurate.
* Disable Hand Tracking in Quest settings
* Use dedicated WiFi 6E, with Virtual Desktop optimized for low network latency, and low GPU utilization.

## SteamVR optimizations

* Use 4x Lighthouse 2.0 base stations, with a solid mounting solution that won’t be subject to vibration. Ensure they never move once installed.
* Mount Lighthouse base stations high, typically in the corners of a room looking down. Optimize their coverage for any area the camera may move in.
* Use 2 Lighthouse trackers:

1. Virtual Camera tracker, firmly mounted to Real Camera
2. Dedicated playspace calibration tracker, firmly mounted to Manfrotto Super Clamp

* Do not use Bluetooth dongles, instead connect via USB using active extensions or optical cables
* Ensure both trackers maintain clear line-of-sight to all Lighthouse base stations as much as possible

## OpenVR Space Calibrator

* Before calibrating playspaces, put one of the Quest Pro controllers in the Manfrotto Super Clamp, making sure the controller’s cameras are not occluded. 
* Hold clamp so that both tracker and controller track optimally throughout calibration process.
* Use “Slow” or “Very Slow” calibration process
* Perform Tai-Chi-like moves with the clamp, slow and steady, including rotations and vertical movement, while moving across a wide area of the playspace. It is important to maintain perfect tracking throughout this process.
* Once complete, check calibration by moving clamp around space and looking for any significant drift. Place a controller against the camera tracker to confirm calibration. Repeat calibration process if necessary.
* Clamp the calibration tracker somewhere with optimal Lighthouse tracking, and leave it there until a recalibration is required. This will help maintain the Lighthouse playspace in case the camera tracker becomes momentarily occluded.
* Calibrate the LIV camera after space calibration
* The calibration can be checked for drift during the session by placing a controller on the calibration tracker. If necessary, repeat the space calibration process and then re-calibrate the LIV camera.