Oof, that’s a good one! If it was up to me, I would include a function to change orientation with the click of a button, but unfortunately it’s not that easy. What you would most likely need to do is to rotate all of your _weight map, density map, infoLayers, DEM, PDA (Overview), etc. 90 degrees in an image editor and resave. That would probably be the hardest part. Then go into GE and rotate the sun, the terrain, all of the parent transform groups, and pretty much anything else you can think of. The good thing is that everything has a translation and rotation and you can ultimately orient them any way that you want. By rotating just the parent TGs you don’t have to worry about every single item contained within. I’m not going to sugar coat it … this is going to be quite the undertaking and a project in itself. If you use Photoshop, you can create an action to do most of the heavy lifting for you with a bulk edit. From there it’s just tweaking everything within the editor itself.

How big of a job this is and how long it would take would depend entirely on your skill level and intimacy/proficiency with the programs you use, the subject matter, and of course GE.

I really wish I had a one click solution for you, but unfortunately it’s either this or leave it.