public float startLifetime ;


The starting lifetime of the particle.

This is the total lifetime of this particle in seconds. The Particle System sets this value when it first spawns the particle.

using UnityEngine;

public class Example : MonoBehaviour { void Start() { ParticleSystem.Particle particle = new ParticleSystem.Particle();

// Calculate how long the particle has been alive. float timeAlive = particle.startLifetime - particle.lifetime; } }