What does the LG support say or the manual? I would think if it has the Real Cinema option it would support 24fps. Leaving Real Cinema on all of the time, in theory, has no effect on any other material other 24fps if the source is encoded that way. In fact, Real Cinema should be grayed out if you try to set it on any other type of source material. For blu-ray movies, TruMotion off and Real Cinema on.