ParticleSystem.NoiseModule.octaveCount

Description

Layers of noise that combine to produce final noise.

Please note that adding octaves will substantially decrease performance.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    private ParticleSystem ps;
    public float hSliderValueOctaves = 1.0f;
    public float hSliderValueOctaveMultiplier = 0.5f;
    public float hSliderValueOctaveScale = 2.0f;

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

        var noise = ps.noise;
        noise.enabled = true;

        // Set color by speed, to demonstrate the effects of the Noise Module
        var colorBySpeed = ps.colorBySpeed;
        colorBySpeed.enabled = true;

        Gradient gradient = new Gradient();
        gradient.SetKeys(
            new GradientColorKey[] { new GradientColorKey(Color.green, 0.0f), new GradientColorKey(Color.red, 1.0f) },
            new GradientAlphaKey[] { new GradientAlphaKey(1.0f, 0.0f), new GradientAlphaKey(1.0f, 1.0f) }
        );

        colorBySpeed.color = new ParticleSystem.MinMaxGradient(gradient);
        colorBySpeed.range = new Vector2(3.0f, 7.0f);
    }

    void Update()
    {
        var noise = ps.noise;
        noise.octaveCount = (int)hSliderValueOctaves;
        noise.octaveMultiplier = hSliderValueOctaveMultiplier;
        noise.octaveScale = hSliderValueOctaveScale;
    }

    void OnGUI()
    {
        GUI.Label(new Rect(25, 40, 100, 30), "Octave Count");
        GUI.Label(new Rect(25, 80, 100, 30), "Octave Multiplier");
        GUI.Label(new Rect(25, 120, 100, 30), "Octave Scale");

        hSliderValueOctaves = GUI.HorizontalSlider(new Rect(135, 45, 100, 30), hSliderValueOctaves, 1.0f, 4.0f);
        hSliderValueOctaveMultiplier = GUI.HorizontalSlider(new Rect(135, 85, 100, 30), hSliderValueOctaveMultiplier, 0.0f, 1.0f);
        hSliderValueOctaveScale = GUI.HorizontalSlider(new Rect(135, 125, 100, 30), hSliderValueOctaveScale, 1.0f, 4.0f);
    }
}