Cool! Excited to have someone else try it out.
Here is a shared Google Drive folder, with the .blend and .fbx exported, I hope the .fbx works for you and also imports the cameras and Sun angle also.
https://drive.google.com/open?id=0B_1FoLT9JNVtWnFMN21pSHo2bXM
I tried to position the sun angle (zenith and azimuth) to be correct for 2:07 in the afternoon, local Delphi time for 2/13.
The ground plane is a mesh I created from LIDAR data, USGS LIDAR .las (both canopy and ground returns), used LASTools to seperate just the ground points, used LASTools to create OBJ triangulated interconnected network (TIN) of the LIDAR ground points. The bridge I created by hand, best guess at tie size and spacing, and width from GoogleEarth measurements
Lastly, my convention is +x is easting, +y is northing and +z up (ENU).