Wheres the texture?

This might sound weird.

But on some of the older routes before trainz 2019, some ground textures would not show up. All that will show up would be track and buildings, but the textures would not only the grid would show. Anything to fix this problem would be appreciative.

No it doesn't sound weird. Is CM showing the route as having missing dependencies?

TRS19 has a bug which will be patched, the current workaround is to bring the route into TRS19 via a previous version eg. TANE. Install in TANE, save as, close, export to cdp and then install in TRS19.