Wittgenstein - Looking for some help

Although it says In the Tratatus that ‘The pictorial relation which turns a fact into a picture belongs to the picture itself.’ (TLP 2.1513) most commentators believe that the “pictorial relation” does not belong to the picture - it is external to it (people like P. Hacker, E. Anscombe & A. Kenny). I’m looking for an article that thinks that the “pictorial relation” is not external but internal.