Help/Paint Tab
From TrainzOnline
Click on the Paint Tab (F2) to
open the Paint Menu. You
will see a number of default
textures, grouped by region.
Use the slider button to scroll
through the list.
Click on one of the textures or write its name on the text box, and you will see a copy of it
appear in the small current texture window. Click LMB on the
terrain and use your mouse as a paintbrush to paint on the
texture.
