Which v.3 do you mean? v3.0 is indeed a bare and empty route west of Monarch... v3.1 addresses this issue and adds the most important scenery (and a bit more) to the western half of the line. This route is still a work in progress -- and will be for ages to come, that's why I keep uploading playable versions from time to time so people can start running trains on whatever portion of the route is finished, or at least "finished enough".
Here's the changelog for v3.1: viewtopic.php?f=7&t=1380
Version 3.1 is in the file library here.


Cheers!
Michael