Bad Transition

I've made recording showing the problem. The idle is working well but when I start moving, the walk animation is glitching out.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.AI;
5.  
6. public class CharacterAnim : MonoBehaviour
7. {
8.     Animator animator;
9.     NavMeshAgent agent;
10.  
11.     void Start()
12.     {
13.         animator = GetComponentInChildren<Animator>();
14.         agent = GetComponent<NavMeshAgent>();
15.     }
16.  
17.     void Update()
18.     {
19.         float speedPercent = agent.velocity.magnitude / agent.speed;
20.         animator.SetFloat("speedPercent", speedPercent);
21.     }
22. }
23.  

 

I'm not sure what the problem is, but even if you got this approach working properly it would still be much better to use a blend tree for this. Just a simple 1D blend tree containing the two animations and using the speed parameter to blend between them.