Look on the DLS for the procedural track by trainboi1.
He made a number of different gauges and textures.
I'm currently using this here:
<kuid:648132:102586> SG 127lb DY Grey Ballast
<kuid:648132:102585> SG 127lb DY Grey Ballast Rusty
For my two basic tracks.
Unlike other Pro-track, they render fairly nice and don't hog the system resources.
The track also has small fishplates to represent the joints between the rails. The tie spacing is also North American and so is the number of ties unlike some of the other tracks on the DLS.