background-image in Outlook Classic

Before

<td style="background-image: url('hero.jpg');
            background-size: cover; padding: 40px;">
  <h1 style="color: #fff;">Hello World</h1>
</td>

After

<!--[if gte mso 9]>
<v:rect xmlns:v="urn:schemas-microsoft-com:vml" fill="true"
  stroke="false" style="width:600px; height:300px;">
  <v:fill type="frame" src="hero.jpg" />
  <v:textbox inset="0,0,0,0">
<![endif]-->
<td style="background-image: url('hero.jpg');
            background-size: cover; padding: 40px;">
  <h1 style="color: #fff;">Hello World</h1>
</td>
<!--[if gte mso 9]>
  </v:textbox>
</v:rect>
<![endif]-->