I have no problem with maybe Vectoring a SHAPE of a pony that you like, and then using your own imagination to draw the tail, mane, cutie-mark ect. The problem lies when the pony is clearly AppleJack and you just stuck Rarity's Mane on her head and made it rainbow XD Wanting to do clean work is fine and dandy, it's not so fine and dandy when you pretty much copy over a screen shot line by line, don't change anything and then claim it's your vectored art XD For my own Ponies I just used the Pony Maker, and plan to try my best to at the least study them enough to color them myself XD