The scene renders as expected. I inherited the camera with the SketchUp scene I imported. Don't know if that makes it a Corona camera. I wanted to inherit the exact same view from SketchUp, not to mention have almost no experience in setting up cameras in Cinema/Corona yet. But disabling the lights with the selection object, as suggested above, along with disabling the sun, seems to get rid of the black and white while in modeling mode, so I can see what I'm doing.