Resolved FreeLook Camera jitter slightly when my character moving and rotating view.

Could you submit a bug report with your project or a simplified version where we can reproduce the bug? It is difficult to tell what is causing the issue.

 

Thanks for the upload. The problem is that you are rotating your rigidBody improperly in Update(), which means that it moves on FixedUpdate but rotates on Update(). These two clock are not synchronized, so you will get jitter as a result of aliasing between the different clocks.

Such inconsistencies are a common error when using RigidBodies. It is important to ensure that 100% of the rigidBody motion happens in a way that is compatible with the physics simulation. So, instead of directly touching the rigidBody's transfrorm, you must go through the rigidBody using rb.MoveRotation() and rb.MovePosition(), and you must do it in FixedUpdate().

When I modify your Player script as follows, the jitter disappears. I did not change the Cinemachine version.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class Player : MonoBehaviour
6. {
7.     [SerializeField]
8.     Rigidbody rigidBody;
9.     public Vector3 moveDirection;//Player's move direction.Vector3.Zero is no move.
10.     [SerializeField]
11.     float moveSpeed = 5;//Player's moving speed
12.  
13.     private void FixedUpdate()
14.     {
15.         UpdateRotation();
16.         UpdateVelocity();
17.     }
18.     void UpdateRotation()
19.     {
20.         if (moveDirection != Vector3.zero)//Only update player's rotaion when moving
21.             rigidBody.MoveRotation(Quaternion.Slerp(rigidBody.rotation, Quaternion.LookRotation(moveDirection, Vector3.up), Time.deltaTime * 7.5f));
22.     }
23.     void UpdateVelocity()
24.     {
25.         Vector3 newVel = Vector3.Lerp(rigidBody.velocity,moveDirection * moveSpeed,Time.fixedDeltaTime * 5f);
26.         rigidBody.velocity = newVel;
27.     }
28. }
29.  

 

I looked at the video, and it looks to me to be render frame vs physics frame aliasing.

Have you tried enabling RigidBody interpolation on the player? Without it, it's difficult to get things to be perfectly smooth, because of render time and physics timestep aliasing.

 

Interpolation tells the physics engine to interpolate the player transform at render time, effectively converting FixedUpdate() motion to Update() motion.

SmartUpdate on the CM Brain auto-detects how the target is moving (FixedUpdate or Update) and causes any camera with that target to update the same way.

If you set the Brain's update method to LateUpdate, it will also work.