Problem with fullscreen

Want to do full-screen slide and need to remake structure:

<ul>
<li><img src="image.jpg"/></li>
</ul>

to

<ul><li style="background: url('image.jpg')"></ul>
Is it possible by this plugin?
And what i need to change to make it possible?

https://ww.wp.xz.cn/plugins/bxslider-wp/