Their main responsibilities are to make sure they pick a right setting, style and visually to tell story this process takes place when the production designer collaborates with the director of photography to overcome with the visual feel and specific needs for the theme.
The production designer is the people that work on parts of vision. As they are in charge of find out the locations, such as changing the signs or putting in a new carpets. An art director is a specialist at reporting to construction department that involves carpenter, painters, plasterers, riggers, and the other traders.
As they play a huge part behind the scenes the most important part they play is to look at the script before a director is approached to give estimates of the topic in art department spends on films.
When the production person read the screen play they try to make it real atmosphere visually also bring the story into real life most important part of their role.
After a breakdown on the script they have a meeting with the director to have a discuss about the best shots of the films e.g to decide rather to use sets and locations it is for them to decide either to built and what to adapted; whether there is a visual theme that recurs throughout the film; whether there are certain design elements that may give an emotional or psychological depth to the film; whether CGI (computer generated imagery) should be used. Production Designers must calculate the budgets, and decide how the money and effort will be spent. These discussions are followed by an intense period of research during which Production Designers and their Specialist Researchers source ideas from books, photographs, paintings, the internet, etc