Shia LaBeouf has taken to the skies for his latest apology to graphic novel writer Daniel Clowes over plagiarism. We all know the story by now - Shia ripped huge chunks of his short movie HowardCantour.com from one of Clowes' books - but the actor is still keen to show that he is oh, so very sorry.

Shia LaBeoufShia LaBeouf Has Apologised To Daniel Clowes, Again

"I am sorry Daniel Clowes," read a message over the Los Angeles skyline this week - an image later posted by LaBeouf on his official Twitter feed. Yep, that's an apology in the sky.

HowardCantour.com was released online last month, though featured no credit to Daniel Clowes, whose book Justin M. Damian is essentially the inspiration for the whole thing. We say inspiration, it also features verbatim chunks from the graphic novel, including the opening line: 

"A critic is a warrior, each of us on the battlefield have the means to glorify or demolish, whether a film, a career or an entire philosophy by influencing perception in ways that if heartfelt and truthful, can have far-reaching repercussions." 

"I've never even seen one of his films that I can recall - and I was shocked, to say the least, when I saw that he took the script and even many of the visuals from a very personal story I did six or seven years ago and passed it off as his own work," Clowes told BuzzFeed.

Shia LaBeoufShould Shia LaBeouf Be Forgiven?

According to the New York Daily News, Clowes is still mulling legal action - this despite Shia's repeated apologies.

"In my excitement and naiveté as an amateur filmmaker, I got lost in the creative process and neglected to follow proper accreditation," the actor tweeted, after the story broke.

HowardCantour.com follows the story of an Internet film critic who is consumed by his own influence as he works on a review of a director he once admired.