I feel like a production designer of a film is very important like every role. They have many responsibilities and has to be very organized. They have to manage alot like shooting locations the set and all and all have to be very creative as well i feel like thats the most important.
The production designer makes sure the film looks good. They are professionally responsible to oversee its visuals. They should know the setting, characters, and time period. They make parts of the film based on the visual aspects. Years of experience regarding film should back them up so that they can manage the movie. They work with the director and producer as well. A style is be portrayed through costumes, lighting, props, sets, etc.