It was California v. Freeman, where Harold Freeman was convicted of pandering by making an adult movie. The California Supreme Court overturned the conviction and the USSC refused to hear the case.
From Wikipedia
"the California pandering statute was not intended to cover the hiring of actors who would be engaging in sexually explicit but non-
obscene performances. Freeman could only have been lawfully convicted of pandering if he had paid the actors for the purpose of sexually gratifying himself or the actors. The court relied upon the language of the statute for this interpretation, as well as the need to avoid a conflict with the
First Amendment right to
free speech."
Freeman has since been sited in New Hampshire and so you're free to let your cameras roll there too.