This is bdthemes shortcodes ultimate (joomla) Shadow example. you can get facility in this shortcode item> Style, Class, Inline, Content.just simply use this shortcode and get Shadow style.
Note: you can use this shortcode article and custom module. for your help we give a example bellow >

Default Shadow Style

[shadow inline="yes"][panel shadow="none"]<img src="http://lorempixel.com/800/300/abstract/" alt="" />[/panel][/shadow]

Left Corner Shadow Style

[shadow style="left" inline="yes"]<img src="http://lorempixel.com/800/300/abstract/" alt="" />[/panel][/shadow]

Right Corner Shadow Style

[shadow style="right" inline="yes"]<img src="http://lorempixel.com/800/300/abstract/" alt="" />[/shadow]

Horizontal Shadow Style

[shadow style="horizontal" inline="yes"]<img src="http://lorempixel.com/800/300/abstract/" alt="" />[/shadow]

Vertical Shadow Style

[shadow style="vertical" inline="yes"]<img src="http://lorempixel.com/800/300/abstract/" alt="" />[/shadow]

Bottom Shadow Style

[shadow style="bottom" inline="yes"]<img src="http://lorempixel.com/800/300/abstract/" alt="" />[/shadow]

Simple Shadow Style

[shadow style="simple" inline="yes"]<img src="http://lorempixel.com/800/300/abstract/" alt="" />[/shadow]