I am currently using Sketchup and Layout 2015 Pro versions for Windows 7. On my most recent model, I’ve experienced a situation where the shadow settings and layers are not retained from scene to scene. If I update one, it changes those same settings in all of the scenes! It appears to only be problematic with this particular file. The only thing I did different in this model was manually set the Geo-location. I have been using Sketchup for over 9 years and have never encountered anything like this!
In the scenes window, verify the desired “save” boxes are checked. Then get each scene the way you want it and update the scene.
That was it! I didn’t think to look there as those have always been checked by default. Somehow only the camera location box was checked. Thanks for you help!