Got one vehicle in the scene so far. The "blimp" is ok from this distance. But I plan on adding more detail (viewing ports and railings (smokestacks?!)) to it for closer shots. It's farther behind the building than it looks. I need more haze to show that's that case. And I want to redo the banner hanging there. Make it look like more wind is hitting on it.
Here is a Nazi armored train in progress. This model will have to be very close to the camera somehow if it's even going to be seen with the entire view of the building in the background.