Is the patent still the original author after cartoon animation?

No, there are usually professional teams to draw. Different companies and teams may do several episodes for a group of people. Probably what the original author said, after the animation comes out, some painters will draw according to the original author's painting style to the greatest extent, and some may have considerable deviation. Generally, after signing the contract, the original author basically ignores everything after cartoon animation, but there are still some situations in which some suggestions are given.