title: How to use UGUI mask and custom font correctly
body: <p>I want to use mask component to show apart of a text with custom font.</p>
  
  <p>But like the pictures say:</p>
  
  <p>When I use custom font with "None (Material)", the mask works very well, but the text is abnormal. (Picture 1)</p>
  
  <p>Someone taught me to change the text's material to "Sprites-Default", then the text will show correctly. And when I change the material, the text show normal indeed, but the mask doesn't work, it can't cover the text which is out of the mask. (Picture 2)</p>
  
  <p>How should I do to make all of them work well?</p>
  
  <p><img src="https://i.stack.imgur.com/qmQjY.png" alt="Picture 1"></p>
  
  <p><img src="https://i.stack.imgur.com/DunRQ.png" alt="Picture 2"></p>