FadePlayableBehaviour.cs

FadePlayableBehaviour.cs

using UnityEngine;
using UnityEngine.Playables;

public class FadePlayableBehaviour : PlayableBehaviour
{
    public GameObject targetObject;
    public bool IsFadeOut;
    private Renderer[] renderers;

    public override void ProcessFrame(Playable playable, FrameData info, object playerData)
    {
        if (targetObject == null) {
            return;
        }

        if(renderers == null)
        {
            renderers = targetObject.GetComponentsInChildren<Renderer>();
        }

        var currentTime = (float)playable.GetTime() / (float)playable.GetDuration();
        for(int i=0; i<renderers.Length; i++)
        {
            var color = renderers[i].material.color;
            color.a = IsFadeOut ? 1 - Mathf.Clamp01(currentTime) : Mathf.Clamp01(currentTime);
            renderers[i].material.color = color;
        }
    }
}