Switching from Deferred Lighting to Forward Makes All Lightmaps Black?

Typically, when I perform a bake, I do it with Deferred Lighting and then switch back to Forward Lighting afterwards so that my builds will run smoother. This always seems to have worked, until today.


(deferred vs. forward)

I really have no idea how to fix this-- I tried clearing the lightmaps and the GI Cache and totally rebaking from scratch-- same result.

I've tried it on multiple computers, all running Unity 5.3.2

One interesting observation: it seems to be related to my shadow settings. With Forward Lighting enabled, if I go into the Quality Settings and disable shadows, everything looks good again. But as soon as I turn on shadows (even at low resolution and with 'hard shadows only), everything goes black again.

Any help would be much appreciated!

 

(and to clarify, when I say everything looks 'good' again, I mean not black. The quality though is obviously lacking at that level)

 

SOLVED. If anyone else encounters something like this, check all of your lights. Turns out I had ONE directional light on that was set to 'Realtime' instead of 'Baked', and that was causing all the issues. As soon as I turned it to Baked and performed another bake, everything was fine.

Still seems like a bug though-- one realtime light shouldn't turn off all the baked maps.