ParticleSystemRenderer.maskInteraction

Description

Specifies how the Particle System Renderer interacts with SpriteMask.

By default, particles do not interact with SpriteMasks and are visible regardless of any SpriteMask being present or not. You can also set up the Particle System Renderer to be visible inside a mask. To do this, set this to VisibleInsideMask. To achieve the invers, set this to VisibleOutsideMask. Additional resources: SpriteMaskInteraction.

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(ParticleSystem))]
public class ExampleClass : MonoBehaviour
{
    private ParticleSystemRenderer psr;
    public SpriteMaskInteraction maskInteraction;

    void Start()
    {
        psr = GetComponent<ParticleSystemRenderer>();
    }

    void Update()
    {
        psr.maskInteraction = maskInteraction;
    }

    void OnGUI()
    {
        maskInteraction = (SpriteMaskInteraction)GUI.SelectionGrid(new Rect(25, 25, 900, 30), (int)maskInteraction, new GUIContent[] { new GUIContent("No Masking"), new GUIContent("Visible Inside Mask"), new GUIContent("Visible Outside Mask") }, 3);
    }
}