Because of a lack of budget I need to create an environment for my main character using cgi / bluescreen . I have not however done any sfx before. The environment would be a room ( fairly simple design ) around 5 m x 5 m in which the character has to be able to freely move . What is the best way to do this using sfx ? I know it would be easier to just build a set however I do not have enough money for that . How hard / long would it take to construct it ?