Complex sentence: During storyboard meetings, artists draw their ideas on post-it notes which covered the walls, table and boxes in the corners of their conference room; the drawings play a major role in episode ideas.
Split into simpler sentences: During storyboard meetings, artists would draw their ideas on Post-it notes, and it would cover the walls, table, and the boxes located in the corners of their conference room. The drawings play a major role in episode ideas.