title: image doesn't show after render animation blender 2.8
body: <p>i have some problem with background rendering in blender 2d!
  i have some simple animation, and i use a picture as a background</p>
  <p><img src="https://i.stack.imgur.com/hKiea.png" alt="enter image description here" /></p>
  <p>and when i try to render animation</p>
  <p><img src="https://i.stack.imgur.com/zEOSw.png" alt="enter image description here" /></p>
  <p>i have an empty background. i have my animation on empty white background</p>
  <p><img src="https://i.stack.imgur.com/alAVw.jpg" alt="enter image description here" /></p>
  <p>please help me to solve this problem</p>