d class=r title='0 = 0x0'>0.1</td>
<td>AlphaFiltering</td>
<td class=c>N</td>
<td><span class=s>[Mask 0x03]
  <br>0x0 = none
  <br>0x1 = Horizontal
  <br>0x2 = Vertical
  <br>0x3 = Gradient</span></td></tr>
<tr>
<td class=r title='0 = 0x0'>0.2</td>
<td>AlphaCompression</td>
<td class=c>N</td>
<td><span class=s>[Mask 0x03]
  <br>0x0 = none
  <br>0x1 = Lossless</span></td></tr>
</table></td></tr></table></blockquote>

<h2><a name='ANIM'>RIFF ANIM Tags</a></h2>
<p>WebP animation chunk.</p>
<blockquote>
<table 