ParticleSystem.MainModule.cullingMode

説明

Configure whether the Particle System will still be simulated each frame, when it is offscreen.

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(ParticleSystem))]
public class ExampleClass : MonoBehaviour
{
    private ParticleSystem ps;

    void Start()
    {
        ps = GetComponent<ParticleSystem>();

        var main = ps.main;
        main.cullingMode = ParticleSystemCullingMode.AlwaysSimulate;
    }
}