@Jolyon Ralph, David Webb
Thats a nice idea, Jolyon, but the UK courts already considered minor modification and copyright, and the ruling in the UK indicates that what counts is creative and visual originality. That something technical has been added within the image, doesn't necessarily make that _image_ an "original work". It isn't about plain "slavish copies" either as David Webb suggests.
Here's that UK Privy Council case again, which speaks directly to this point. Speaks several times in fact, probably to make sure people get the idea :) :
"It may be and no doubt is the case that that information involves important functional concepts, and even a good deal of technical research, but [...] what this case is concerned with is not an idea or a concept but artistic copyright claimed in the drawings. [...] What is important about a drawing is what is visually significant and the re-drawing of an existing drawing [= reproduction of a 2D image] with a few minimal visual alterations does not make it an original artistic work, however much labour and skill may have gone into the process of reproduction [...]"
"I think it clear that it will not create copyright in a new edition of a work, of which the copyright has expired, merely to make a few emendations of the text, or to add a few unimportant notes. To create a copyright by alterations of the text, these must be extensive and substantial, practically making a new book. With regard to notes, in like manner, they must exhibit an addition to the work which is not superficial or colourable, but imparts to the book a true and real value, over and above that belonging to the text."
"Copyright is concerned not with any originality of ideas but with their form of expression, and it is in that expression that originality is requisite. That expression need not be original or novel in form, but it must originate with the author and not be copied from another work ... A drawing which is simply traced from another drawing is not an original artistic work [...]"
"[C]opying, per se, however much skill or labour may be devoted to the process, cannot make an original work. A well executed tracing is the result of much labour and skill but remains what it is, a tracing. Moreover, it must be borne in mind that the Copyright Act 1956; confers protection on an original work for a generous period. The prolongation of the period of statutory protection by periodic reproduction of the original work with minor alterations is an operation which requires to be scrutinized with some caution to ensure that that for which protection is claimed really is an original artistic work."
Anyone still arguing that in legal terms, a _UK_ equivalent of the Supreme Court haven't ruled on matters extremely closely related to this case? Anyone still inclined to claim that Bridgeman is a purely US case and UK law hasn't ever considered it? Did anyone actually _read_ "Bridgeman" and noticed that while not binding in the UK, it was nonetheless decided by applying _UK_ law?