NonLoopingParticles.cs

//Steffen Vetne made this
//Creative Commons 0

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class NonLoopingParticles : MonoBehaviour
{
#if UNITY_EDITOR
    private void OnValidate()
    {
        var m = GetComponent<ParticleSystem>().main;
        if (m.playOnAwake)
            m.playOnAwake = false;
    }
#endif

    private void Awake()
    {
        var m = GetComponent<ParticleSystem>().main;
        m.loop = false;
    }
}