But, I worked in a very well known Hollywood film studio that had mandatory 10 hour work days with an 8 hour core window, not including crunch times. They factored overtime pay into the schedule. This meant that all employees were being paid some 1.5 time, that double-time would hit sooner than you'd think, but also be a lower rate than what you might expect. It was all documented and reported on my tax forms, and within the bounds of California law AFAIK.