title: Trouble implementing material in Spark AR
body: <p>I am new to spark AR studio. I have built an effect, Im using particle system but when I add some material this particle system gets invisible. I dont know how to figured out</p>
  <p><a href="https://i.stack.imgur.com/RzPj8.gif" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RzPj8.gif" alt="enter image description here" /></a></p>