He is the writer, director, producer, leading actor and financier of "The Room", a love drama turned unintentional comedy which is considered by many one of the worst films ever made, since it showcases virtually everything than can be done wrong in a movie. According to Wiseau, he put millions of dollars of his own money into this amateurish suckfest, which still somehow looks like a no-budget film with actors that were randomly picked off the street and forced to recite some of the most laughable dialogue ever recorded.
I absolutely recommend that movie over any truther effort, since it is one of the very few movies that actually
are so stupid and bad that it's somewhat entertaining and not just stupid and bad like a truther movie. Still, all of them fail for the same reason: people with considerably more passion than talent putting their money into terrible projects that are dear to their heart but would have never been made if someone who knows the first thing about making films of acceptable quality and market appeal would have been involved.
Of course when it turns out that no distributor is interested in their godawful load of crap, truther filmmakers can still try to market it as "the film that is banned from theaters", like they did with "Operation Terror".