True to source tag

Apologies if I just couldn't find it for myself, but I was looking for some sort of tag that would denote that a post is "true to source" in terms of art style, body proportions, etc. This may be too loose of a definition/too subjective to be a tag, but I'll link an example to what I would consider "true to source" vs what I might not consider "true to source".

True to source: post #6783218

Not true to source: post #6751941

i figure a simple -alternate_* would get pretty close, though alternate proportions/features aren't always tagged and we have no "alternate art style" tag.

Official Style is probably the closest.

Both great options, thanks! That's pretty much what I was looking for.