thanks, both of you.
I did spend hours upon hours reading all I could find on copyright, and how it might apply to quilt design and quilts. It *would* be possible to register a quilt design, if it were original enough. So, for example, I couldn't make a simple log cabin quilt and register that design, as it's traditional/public domain. But, perhaps I could register my Oceans of Love quilt, which is a Storm at Sea blocks, but VERY untraditional/very original coloring, I think giving it enough originality that it could be registered.
I'm fuzzy on whether just the design itself (if, for ex, I made it into a pattern) or also the quilt itself (as a 3D art piece) are register-able, but I *think* both, although registered separately. I think. And then that gives me (actually, just having made it in a fixed manner, either on paper or in cloth) gives me sole right to produce copies of the item. So, in case of a published pattern (if I made a pattern, then offered it for sale), people could of course buy the pattern and make the quilt, but could not make a copy of the pattern to distribute to others.
But if I registered the quilt, as an UNPUBLISHED, 3D piece of art -- then no one would, theoretically, be able to copy the quilt itself. I think, if I'm reading all of that right. So much depends on whether I (or anyone) intend to publish the pattern, or if it is simply a piece of artwork I've made that I do not wish to publish. (and I believe blogging about it falls in "public display" which does NOT equal publishing).
All that to say, I think honestly the quilt that got copied would have been protected, but as there are no damages to seek, and no money was earned (that I know of) by her or taken from me, it's all resolved just fine at this point. It's the future quilts in my head that I would want protected, from exactly the issue you described, Rosemary, of the quilt owned by the guild, then someone saw the photo, copied it, and now selling the pattern.....massive infringement, that. I'd not want that to happen.
I do think I'll be rethinking what I share about some particular quilts. Not all, for sure, but some. Which makes me sad. Still pondering this......