Spine Frustrum Culling

SpineFrustrumCullSkeletonAnimation.cs

using Spine.Unity;
using UnityEngine;

[RequireComponent(typeof(Renderer), typeof(SkeletonAnimation))]
public class SpineFrustrumCullSkeletonAnimation : MonoBehaviour
{
    private SkeletonAnimation _anim;
    private Renderer _renderer;

    void Start()
    {
        _anim = GetComponent<SkeletonAnimation>();       
        _anim.enabled = GetComponent<Renderer>().isVisible;
    }

    void OnBecameVisible() => _anim.enabled = true;

    void OnBecameInvisible() => _anim.enabled = false;
}