In the Trainz simulation ecosystem, a .cdp file is a . Think of it like a .zip file specifically designed for Trainz. It contains game assets (trains, scenery, routes, sessions) compressed into a single package for easy distribution.
CDP files are essentially compressed archives—similar to ZIP or RAR files—but formatted specifically for the Trainz engine. An extractor reads the binary data of the CDP to: trainz cdp extractor work