Board Thread:Support Requests - Getting Technical/@comment-27794543-20161105075834/@comment-24473195-20161105122208

The difference seems to be in the resolution of the images. Lucifer has a higher resolution, so when it is scaled down it may fit it properly. If one wants the images to fit perfectly then the simplest thing is to edit them and scale it to the exact size used in the slider, as described in the help page;

http://community.wikia.com/wiki/Help:Galleries,_Slideshows,_and_Sliders/wikitext#Slider