In VirtualCast, calibration is executed during character change.
Calibration is a feature to absorb the physical difference between the user and the character so that the motion of the character replicates the motion in reality as closely as possible.

• Full-body tracking system allows you to move
  not only head and hands but also feet by using Vive Trackers.
• To change characters when utilizing full-body tracking,
  face forward with your legs tightly closed and your arms stretched straight to the sides. (aka T-pose)
• When you are not using full-body tracking, just using HMD and controllers, you do not need to T-pose.

• When you are only using HMD and controllers, the calibration is performed using the height of the character's eyes and the height of the player. * The user height can be set in Ring Menu or the start screen in VirtualCast.
  Enter the height of the player. * Height of the character's eyes are set by FirstPersonOffset value in VRMFirstPerson.
  Set the FirstPersonOffset to the height of the character's eye-level.

• The specification is as of Version 1.8.1.

• [Updated on 11/14]VirtualCast Ver 1.8.1a release
• VRM First-Person View