Thread:Supratim1986/@comment-30939772-20190315083654/@comment-211667-20190315094345

If the Illustration have been part of Official publication (like in the Premium release of the LN Volumes or from the Manga volumes), or have been posted by the Author or Illustrator or Mangaka for the series him/herself (on their Twitter handle for example), then they would be Official.

Any other type of Illustration can't be considered as official and would fall under Fan-Art.

Remember to upload the images in ".png" format, while keeping the image height at 1200px or lower (no need to upload too large image). Also properly "Name" them (like, if the source is Light Novel, put "LN" as a marking in their name; or if its a Twitter image, name it as "Artwork"), and also add-in a description regarding their source (only provide links if its from Official Twitter or something).