My framerate is fine. I do worry about Outerra lighting, though. If just the forerunner can cause such a hit, one wonders what the hundreds, or many thousands of lights of a city will do. 
Normally, buildings light should be made as emissive textures (that's the name, I think), like the one there was on the Outerra billboard. It has a really low impact on perfs, it's not even a real light, just a texture parameter. Most of the fligh sims handle lights this way, you can also add simple area lights which only illuminate an area and don't produce shadows.
If we start to add dynamic lights everywhere, yeah, Outerra's framerate will go down. But not a single engine in the world would handle that
Oh... no... 
I just thought nobody likes my work. PayPal makes me mad... there are no other options. There are only WebMoney, but I do not think they are for other countries.
I hope you'll find an alternative, your creations seriously deserve it
