Version: 2018.1
public int ribbonCount ;

Description

Select how many lines to create through the Particle System.

For example, if using 1 ribbon, a single line is drawn, starting at the youngest particle and travelling through each subsequent particle based on their ages, until finally reaching the oldest. If using a value larger than 1, multiple lines are drawn, connecting each Nth oldest particle. For example, if using 3 ribbons, every 3rd particle is connected (1,4,7, and 2,5,8 and 3,6,9).

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { private ParticleSystem ps; public float hSliderValueRibbonCount = 1.0f;

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

var main = ps.main; main.startColor = new ParticleSystem.MinMaxGradient(Color.red, Color.yellow); main.startSize = 0.1f; main.startLifetime = 2.5f;

var trails = ps.trails; trails.enabled = true; trails.mode = ParticleSystemTrailMode.Ribbon;

var psr = GetComponent<ParticleSystemRenderer>(); psr.trailMaterial = new Material(Shader.Find("Sprites/Default")); }

void Update() { var trails = ps.trails; trails.ribbonCount = (int)hSliderValueRibbonCount; }

void OnGUI() { GUI.Label(new Rect(25, 40, 100, 30), "Ribbon Count");

hSliderValueRibbonCount = GUI.HorizontalSlider(new Rect(125, 45, 100, 30), hSliderValueRibbonCount, 1.0f, 4.0f); } }