Before reading this tutorial, please make sure to carefully read the SteamVR integration!!! If the rebocap tracker icon has never lit up on SteamVR, this tutorial is meaningless!!!

VRChat Basic Settings

Introduction to VRChat Basic Settings

To open the basic settings, follow these steps: Press the Y button on the controller to summon the menu -> click the gear icon -> scroll down to Tracking & IK, as shown in the figure

Key points of the basic IK settings introduction:

1. Adjust the height in VRChat

   User's actual height, fill in the height measured in Rebocap here, not your actual height! Because all trackers are simulated according to the height measured by Rebocap.

   Rebocap measures height as headset height * 1.05. For height measurement errors, please refer here.

   If the height measured by your headset is always inconsistent with your actual height (exceeding your height by ±5cm), you can turn off the automatic height measurement in the VR panel and adjust the height on the skeleton page. The final displayed height is the standard! Then in VRChat, set the height to the final displayed height in Rebocap. Note, this solution is not the best, because if the headset itself measures the height incorrectly, the displacement of the headset in space is also incorrect. For example, if the headset actually moves down one meter, the data provided by the headset may only show a movement of 0.6 meters, resulting in poor tracking performance!

To check the Rebocap height measurement method: open the log to see the historical messages (if you turn off automatic height, it will not be displayed here!)

1. Adjust the VRChat measurement mode

   Users who are new to full-body motion capture in VRChat should uniformly use the Height mode! Users familiar with VRChat IK can consider using the Arm mode, in conjunction with Arm.

2. Allow full-body tracking

   Must be allowed, as shown in the figure, the status is enabled.

3. IK lock mode

   This can be adjusted to see different effects. If unsure, you can use LockHip or LockHead. The effects will vary significantly, especially in sitting or lying down postures.

Introduction to VRChat Advanced IK Settings

To open the advanced settings, follow these steps: Press the Y button on the controller to summon the menu -> click world, a large settings panel will appear -> click the gear icon -> select Tracking & IK on the left, as shown in the figure

Special note: For users new to full-body motion capture in VRChat, use the default settings for everything except what is marked in the figure!!! You can refer to the screenshots.

Introduction to the 4 settings marked in the figure:

1. Whether to use the traditional IK switch!

   It is not recommended to enable it. The default is to use IK 2.0. Using traditional IK will bring other issues, such as the waist sinking into the buttocks.

2. Arm height ratio

   This option is only effective when the measurement mode is set to Arm! It is for users familiar with VRChat IK. It is not recommended for unfamiliar users. If there are issues, you can communicate with other users. The official does not provide technical support for this point!

   Generally, when set to Arm mode, you can adjust the ratio here to make the legs appear more natural. The specific method is to open the calibration mode in VRChat, see the tracker points, and adjust the ratio so that the tracker points on the feet are near the instep.

> **[danger]Notice**
>
> If the user finds that some points are missing, it is very likely that they have fallen under the floor! Try lifting your foot to check!

1. Whether to display the tracker calibration range

   That is the green range sphere

2. Switch tracker display model

   If you need to switch to a cross, set axis as shown in the picture, you can switch and check by yourself

How to calibrate in VRChat

After completing the basic settings, follow these steps:

1. Press the Y button on the left controller to open the settings panel

2. Click the little person icon on the panel (provided that the virtual tracker in SteamVR has been activated, otherwise the icon here will be different from the one below. If unclear, please check SteamVR Integration)

   

3. Adjust your standing posture, pose in a T-pose, and make sure the tracker points on the instep are near the instep. If the green range sphere is turned on, make the range sphere as small as possible (advanced users familiar with IK can adjust it themselves)

   If you find that the instep is under the floor, this is often caused by a bug in VRChat. VRChat has issues with ground recognition. For example, if you place the controller on the real floor, the position of the controller in VRChat might be under the floor (the same applies if it is floating).

   Currently, there is no good solution. You can restart VRChat or, after calibration, use ovr advanced setting to adjust the ground height. Make sure to adjust after motion calibration!!!

4. Maintain the T-pose. If the whole body is aligned, press the trigger buttons (the buttons usually pressed by the index fingers) on both hands simultaneously to complete the calibration in VRChat!

Troubleshooting Steps for VRChat Issues

Non-detailed issues, detailed issues generally refer to: legs cannot straighten in a certain state, etc. These are highly related to VRC and skeleton settings. Further explanations will be added later.

This mainly addresses issues like misalignment or overall disarray.

Detailed issues will be documented later. For now, you can consult experienced group members.

• Check if the 3D preview interface is normal

• Check if the trackers in the default SteamVR interface are normal

  For details please check here

• Check if the key settings in VRC are consistent with the above tutorial

Why can't the character's arms straighten in VRC

• This is caused by a mismatch between the model skeleton and the user's skeleton. If the model skeleton's arms are shorter, it is easier to straighten. The core issue is the inconsistency between the skeleton proportions and the real person.

  Advanced users can try using Arm mode and then modify the arm vs height ratio.

  Here is an extreme example to help users understand: if the virtual character's arms are 3 meters long and the character's height is only 1.7 meters, the real person's arms naturally hang down to the waist. However, VRChat must respect the real person's hand position, so the virtual character's arms will have to bend at a certain angle.

Why are the character's feet under the floor during calibration

This has been explained in the third point of How to calibrate in VRChat

Why can't my legs straighten

This is related to the significant difference between the virtual character's skeleton proportions and reality. Generally, using a character skeleton that matches your own and adjusting it in rebocap to the same skeleton yields the best results.

Additionally, you can use some calibration tricks to alleviate this issue, such as setting the height in VRChat slightly lower than the measured height in rebocap. Legs are easier to straighten in sitting mode.

This is aimed at non-dancing users. For dancing users, it is still recommended to set the height according to rebocap measurements.

Why do my feet cross when sitting down

1. Exclude the influence of crotch pulling
2. Change the position of the thigh tracker and check the effect of different positions
3. If the issue persists, adjust the compensation (prioritize adjusting thigh compensation) based on the effect in the 3D preview!
4. During motion calibration, keep the distance between the feet closer
5. During VRChat calibration, keep the distance between the feet closer

For detailed descriptions of points 1 and 2, please carefully read the tutorial section

How to improve stability

1. Use the complex binding method for straps, or purchase wide straps
2. Handling the foot sensors is quite important, please check here
3. For dancing users, especially those performing intense dances, it is recommended to find an environment with relatively good magnetic fields and turn off the anti-magnetic mode for use

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