These examples are images with dynamic css shadow. The shadow is automatically inserted, all these with only one class added to the image's hyperlink.
<a class="thumbnail has_shadow lifted" href="#">
<img class="img-responsive" src="images/img-06.jpg" alt="">
</a>
<a class="thumbnail has_shadow curledf" href="#">
<img class="img-responsive" src="images/img-06.jpg" alt="">
</a>
<a class="thumbnail has_shadow perspective" href="#">
<img class="img-responsive" src="images/img-06.jpg" alt="">
</a>
<a class="thumbnail has_shadow raised" href="#">
<img class="img-responsive" src="images/img-06.jpg" alt="">
</a>
<a class="thumbnail has_shadow curved" href="#">
<img class="img-responsive" src="images/img-06.jpg" alt="">
</a>