There are many reasons to want to make or use a slider from a custom post. So how do you make sliders for custom post types by using WordPress? By the WordPress program alone, you can’t. Instead, you would have to install a slider plugin in order to accomplish this trick.
This can be accomplished in six, relatively easy steps. First you want to install and then update Soliloquy slider plugin onto your WordPress website. Then, you want to install and activate the plugin’s Featured content; this is an add-on function that is available with the plugin. Then you want to add a featured content slider and select your custom post type. Finally you want to publish the image slider and add the shortcode to a post or to a page.
Read the full article here:
How to Create a WordPress Slider for Custom Post Types