Damn it! I have the same idea last year, too bad I can't make it happen! Here is my render in Nov, 2016 (Just sharing for fun!). Great work though!!.
I'd really like to put the whole subject of copying keycap sets to rest here, if possible. The other GB has been shelved, and I'm not interested in hashing out that thorny issue in this thread. But I do want to make my position on the subject clear, so we can just move on.
I fully acknowledge that colorways can't be "owned", especially since very few of them are truly unique or original. Many folks will come up with the same (or very similar) color schemes independently. I absolutely do not claim any special ownership of the simple idea of a keycap set composed of green keys. In fact, if Rocketeer was just a set of green keys, I wouldn't even bother with it; there's nothing special about that.
What makes the Hermes Rocketeer project special, at least to me, is that its concept is driven by the vintage Hermes Rocket typewriter. The color of the keycaps were specifically chosen to match, as closely as possible, the colors of that typewriter. And, in fact, the MassDrop group buy I am trying to put together is not just a green keycap set, but a complete bundle with 60% keyboard, keycaps (with themed novelty keys, BTW), custom aluminum case designed by other notable community designers, and color-matched cable. I am pretty sure that none of the other proposals for "lovely green keycaps" have made the same effort to deliver anything of this scope.
That's why I take no issue with anyone else putting together a green colorway. None of us can claim "ownership" to the idea of green keycaps, and seeing other people's colorways--even ones similar to my own--is interesting to me, not bothersome. In this particular case, however, I was disappointed that the proposed set was not only an exact color match (for the alphas), but the name and concept was appropriated as well. That's more than just a case of hitting on the same colors by accident.
As for your render, it offers green keycaps but not a full keyboard package tied to a particular concept, and so I wouldn't consider it a copy or even a competitor for the Rocketeer group buy.
(And just for the record, my first render/description for this was posted on Aug-23-2016:
https://geekhack.org/index.php?topic=25674.msg2246628#msg2246628)