This thumbnail page is also completely responsive AND used the masonry library. It has a fixed number of thumbnails and depending on the available space the library tries to display them without any spaces. This looks best if you have many images with different orientations! To enable this set: $responsive_thumb_page = true; $show_clipped_images=false; $use_thumb_pic_size_as_width = true; and increase the $thumb_pic_size to e.g. 250 or 300. Clear the image cache afterwards. Setting $show_clipped_images to false also changes the album overview images! So if they should look the same than before I recommend to use a folder.png! Download example.