I'm getting patches of solid black on renders when using BOSS portrait lights, shifting camera angle or position of light doesn't seem to make any difference.
Definitely a problem with the lights as the scene renders OK without them.
I've been having a further play with this and found it was a couple of softboxes, tried changing the settings but to no avail, I just turned them off and everything was fine, the effect from the remaining lights was good enough for what I wanted. Going to try exact same lighting with a different scene/pose and see if it repeats itself.