Using painters tape to create a copy of any area is a technique to create custom patterns. It's a pretty easy work step but a huge help for creating female custom pieces.
Art by manga artist Ren Hidou. I have to admit that I don't know what this is from or what it's about but it is so beautiful and I am unbelievably impressed
The Familiar of Zero Adventure Fantasy Romantic Anime Manga | Zero no Tsukaima F | Zero no Tsukaima Chevalier - Princesses no Rondo - Favorite Anime Manga