Animation background art, shirobako, Create an illustration featuring the close-up of an anime producer's desk at an anime company, with an emphasis on animation background art. The desk is cluttered with project proposals, storyboards, and character sheets scattered across its surface. In the background, there is a bookshelf filled with numerous documents and anime merchandise. The desk also has a mug, a computer with an email screen displayed, and other stationery items. The overall scene should be chaotic, capturing the busy and vibrant atmosphere of an anime producer's workspace --ar 16:9 --niji 6