Black Render pass

[Streetwise]

I've got a scene that all of the sudden gives me a black RGB color pass in both IPR and Render. Doesn't matter which camera. All other render elements are fine (alpha, reflection, wirecolor, etc). Lights are all on, globals on. No warnings. I've even tried doing a hard reset for the renderer. Still black as can be even while building the light cache.

Weird.

[Streetwise]

So apparently it was something going on with the physical cameras in the scene. I replaced them and all is good now.