User blog comment:DoomFest/~The Great Thumbnail Contest - Season 2 ~/@comment-26561766-20160415192601/@comment-26561766-20160416112238

It's the way you place the pics into the thumbnail, if it's halfway (or centered), more on the left or on the right, the zoom on the pic, if it's more focused on the head or if we see more the body of the characters. It's hard to explain in English for me, so if you don't understand tell me I will try to reformulate.