Producers often maintain their control by acting as the primary financier of the film itself. Producers often run production companies that can green-light films, and therefore have aspects of their position that would be similar to studio executives. In this way they extend their control by setting rules and standards for how much money the film will get, what has to be included for the film to actually get produced, and in what markets the film will be distributed. If a Producer does not like any of the decisions a Director, or anyone else, has made, they have the ability to veto the decision. They have even more creative control in post-production because digital effects and copyrighted material costs money. Since they are the manger of finances, and possibly the financier themselves, they can decide against expensive editing effects and materials that would require royalty payments.