Can I create a parallax effect with the slider?

If you want to have this effect:

it can’t be done with our slider, but it’s just a simple div with a background, and a fixed background position, so you could do it with your own code:

<style>
    #parallax_example{
	background: url('http://www.nextendweb.com/demo/smartslider2/images/fullwidth/bg2.png') no-repeat fixed;
	width:100%;
	height:200px;
    }
</style>
<div id="parallax_example"></div>
If you put more into one page, give different id-s to different div-s.

What we call parallax in our backend, that is different. You should check out this demo to see, what it does with a simple sliding animation.