A lot of the entries in the official_art tag aren't actually official, at least not primarily. They only have the tag because a reference image is embedded next to the fan art which is the primary focus of the post. And sometimes the "official art" in question is a screenshot, not even artwork at all!

Should there be a separate tag for reference_image_included? I've seen more than one person confusedly commenting on things that clearly aren't official art on why they have the tag.

Since there's some confusion in several cases, it sounds like a tag like this would be a good idea. Although not all reference images would fall under official art, so would official_art + reference_image_included be enough or might something like official_reference_included be better?