Auto Exposure and WB Greyed Out

[igendreau]

So I know that you have to be doing a production rendering to use Auto Exposure and Auto White Balance. What else would cause that option to be greyed out? I have it set to a production rendering, but those options are still greyed out. But if I create a new Sketchup file and go to render settings, Auto Exposure works. So clearly something in my first rendering is not allowing Auto Exposure to function. Any ideas where to look?

[igendreau]

Sorry, found it. If anyone else cares to know, under Global Illumination > Secondary Rays has to be Light Cache, not Brute Force. That will prevent Auto Exposure from working.