: Save your design as a .tga or .dds file to ensure the game can read it.

: Use a graphic editor like Paint.net to create the layout of your sign (e.g., route numbers or destination names).

: You may need to reference your new texture in the bus's .bus or .cti configuration files so the game knows to display it as a physical object in the window. Note on .rar files

: Move the finished file into the Texture folder of the specific bus you are using (located within the OMSI 2/Vehicles/ directory).