(Warning: Description is not mine)  
Two-layer cel, created at #DutchComicCon 2018 (Spring ed.) and hooboy, this work was plagued with little imperfections. First off, it was supposed to be finished at DCC 2017 Winter, but I had to stop at the Luna layer because I had incorrectly drawn one of her ears. When I re-printed the lines, I was unsure how to align her with her sister cel (hur hur), and it turns out I printed her roughly 1 newline / 1 cm too high. He pupils had an extra line in it, some of the paint went runny, I applied skin tone to the mane on her forehead and actually rested my hand on her wing while the paint was wet and made some smudges that I could barely remove. Oh, and to top it off - I forgot to mirror the images so the whole image is now mirrored. Not a big issue, per se, but Luna’s moon collar (where the paint ran) is clearly the wrong way around… I’m still kinda happy with the result though…
 
Original line-art: twitter.com/Nanook1234/status/…