Thanks I knew it did not work but did not know the reason. My latest issue is adding color to text. Shows up in trainz with no texture.
I assume you mean text in a sign?
What I do, is construct the sign face, apply a color shader, then select the face, right clik, make unique texture, select that new texture.
Then re-name it "sign" or similar, clik the edit tab in the materials menu, then to the right of the folder icon, in the texture section, choose "edit in external editor", which will open the image in your image editor of choice.
You can pick the default app to open for this task in Sketchup Window menu, preferences, in the Applications section.
There I make my sign (photoshop) using the text tools, or by using an image and scaling/sizing to fit the face.
Save, and it will appear in the materials palette, and replace the colored unique image on the sign face in the SU window
This way you can make any sign or text you may ever need
If a sign will have a frame around it, (like the Laurium sign and the two big signs in the pic below) make the texture face large enough so that when you come back from your image editor to apply it, the added image area can be used to texture the sign frame.
Rico
Examples:
