Hi Bruce
Could you possibly provide a few more details for us?
Firstly, could you confirm the full names of the track asset and ground texture asset you are using when in the screenshot you've provided?
Could you also please confirm for me what you have the 'Shader Quality', 'Texture Detail', and 'Post Processing' settings set to in the Trainz Settings? You can find these by following these steps:
1) Double click on the TRS19 icon
2) Click on Trainz Settings
3) Click on the 'Performance' tab
Regards