Unity3D - руководство по скриптописанию

Component.particleEmitter

The ParticleEmitter attached to this GameObject (null if there is none attached).

JavaScripts

particleEmitter.emit = true;

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
void Awake() {
particleEmitter.emit = true;
}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

def Awake():
particleEmitter.emit = true