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Change Mecanin animation Layer weight

Hello Chris,
I could not find a way (through action lists) to change the weight of an Animator layer.

Say i want the player to pick up a box. When this happen, rather than triggering a custom animation, i want instead to set the weight of the masked layer containing the additive pose to 1.

My player is 3D and is using Unity Mecanim's animation system.



  • edited December 2021

    Here's a custom Action, Player: Set layer weight, that you can plug into your Actions Manager.

    Name the file ActionPlayerWeight.cs, and place in a new Assets folder.

    using UnityEngine;
    using UnityEditor;
    namespace AC
        public class ActionPlayerWeight : Action
            public int layerIndex;
            public float newWeight;
            public override ActionCategory Category { get { return ActionCategory.Player; }}
            public override string Title { get { return "Set layer weight"; }}
            public override float Run ()
                KickStarter.player.GetAnimator ().SetLayerWeight (layerIndex, newWeight);
                return 0f;
            #if UNITY_EDITOR
            public override void ShowGUI ()
                layerIndex = EditorGUILayout.IntField ("Layer index:", layerIndex);
                newWeight = EditorGUILayout.FloatField ("New weight:", newWeight);
  • Thanks Chris :)

  • Hey there! I found this script and could use it for my project. Thing is, the script gives me the error 'ActionPlayerWeight.Run() not all code paths return a value. Sorry if this is a minor issue. Just started to get into cs aswell. Cheers!
  • Welcome to the community, @Voxxy.

    It's my fault - I made a typo in the code. I've corrected the post now.

  • Thanks alot for the lightning reply, @ChrisIceBox! And thanks for your awesome adventure creator. Will this script work in sprites unity complex aswell?
  • It should, yes.

  • Works perfectly now! Thanks!
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