As a brony i couldn´t be more amazed for a story so enchanting that takes place a few moments before Shining and Cadence saved the day, with a "what would had happend if... As an artist i cannot be more happy and proud that you had developed such a personal art, not just in Shapeless Sun, but in every piece of art you have posted, and be loyal to it, improving but never stoping being yourself. And as a fan....what can i say? You´ve taken some of the most amazing characters of mlp, in the precise moment when all hope was lost and you made an entire new story, impactating, ,enchanting and hooking to the point that we put all apart to see your new work first. Never change, because we´ll stay by your side, even if you go to Texas, The Moon, the Past, or you stop drawing for a month, a year or a decade...we´ll be here for you,so never EVER stop being the great artist,drawer and, most importantly, amazing person that you are and that we love
While the backdrop does look like the cocoon, I don't think Celestia's been transformed that far yet. We've seen her in the cocoon for two panels, and while she was slightly more degraded in the second (more holes in mane, mane no longer sparkled, bigger hole in horn), I don't think she'd have completed the transformation in roughly the same amount of time - since the horn in the second panel is so fully Changeling.
Also, yeah, the artwork really has been improving - especially when you look back to the first few panels. You've gotten really good at this.
First I copy and pasted the horn line, and changed it to green. Then I put a green layer over it and lowered the opacity. Then I drew over the horn with various styles of brushes, lowering the opacity for all of them. I did it in Illustrator CS2.