User blog comment:Tridan V2/Horius, Watcher of the Sands/@comment-6292556-20131129154430/@comment-5663427-20131201173502

At first, you need to enter "Source mod" (look at the bar below when editing post and find this icon: [ ]). Then add photo, once photo is added, erase |thumb (if chosed thumbnail). Hope i helped ^^