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[1487] Hand tracking shown extremely different in remote users
When using VRChat's native hand tracking on PCVR, the hand movements that are displayed locally do not correspond accurately to what remote users see. The core issue appears to be that finger curl data is transmitted on a per-finger basis rather than per-joint, similar to the legacy Index-controller finger curl implementation. This leads to incorrect representation of specific hand signs, particularly those that involve fingers being straight but angled. Users employing custom OSC hand tracking do not face this problem, highlighting a discrepancy in how hand tracking data is processed and transmitted in VRChat. Steps to Reproduce: Use VRChat on PCVR with native hand tracking enabled. Perform hand signs that require specific joint-based finger curls (e.g., fingers that are straight but angled). Have a remote user observe the hand signs. Compare the hand movements observed by the remote user with what is displayed locally. Observed Result: Remote users observe incorrect or misaligned hand movements due to finger curl data being transmitted per-finger instead of per-joint. This issue is consistent across different users and instances, regardless of whether VRChat is restarted or even reinstalled. Expected Result: Hand tracking data should be transmitted per-joint rather than per-finger, ensuring that remote users see an accurate representation of the local user’s hand movements. This is essential for the proper execution of Sign Language and other precise hand gestures in VRChat. Frequency: Always Impact: This bug severely impacts users who rely on Sign Language for communication, as it prevents accurate representation of certain hand signs. The lack of precise hand tracking translation compromises the ability to communicate effectively using Sign Language in VRChat. Additional Information: The issue occurs across multiple users, instances, and devices. Users with custom OSC hand tracking do not encounter this issue, suggesting a difference in how tracking data is handled. Accurate transmission of hand movements, down to the individual joint level, is critical for Sign Language and other detailed gestures.
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