Using Tacview's static objects function, I added the runways to the 3D terrain.
EDIT: Now the glideslopes add-on is available, too.
DOWNLOAD Runways Add-on (ZIP 2KB)
DOWNLOAD Glideslopes Add-on (ZIP 3KB)
To install, copy the "Data" folder (and its content) to where Tacview.exe is.
The file structure will be like below:
Tacview.dat
Tacview.exe
Data\StaticObjects\Runways.xml
Data\StaticObjects\Glideslopes.xml (Optional)
The runway objects are transparent cubes.
The cube bottoms are the actual runway surfaces.
I made some cubes heights very high to make the runways under the 3D terrain visible.
The glideslope cones are angled 3 degrees and have 0.2° height (+/- 0.1°) and 0.4° width (+/- 0.2°).
The length is 17km which is the approximate distance to the IAF.
I hope you like it.