Trainz/File Types (File Extensions)

In addition to the following, Trainz also makes extensive use of many of the file types common to Windows.

ANIM

Animation, for example a steam locomotive's connecting rod movements, or water movement on a river or lake.

BMK

Bookmark. Used to note the current camera position in Surveyor (?).

CDP

Content Dispatcher Pack. A file used by Auran and some other content creators to distribute additional assets. A CDP file can contain one or more assets.

CDP2

Content Dispatcher Pack 2. A new version of the CDP format, used by Auran and some other content creators to distribute additional assets for Trainz Classics.

CFG

Used to store the program's configuration details. This is a widely used file type, but the format is specific to each program.

CHUMP

Cache file.

GND

The terrain file that contains the topographic details of a map. This is the file that is produced and replaced when creating a map from DEM data.

GS

GameScript source file.

GSE

GameScript encoded file.

GSL

GameScript library file.

GST

GameScript template file.

IM

Indexed 3D mesh.

JA

Jet Archive. Contains compressed copies of multiple assets.

KIN

Kinematics. Associated with animations such as pantographs.

OBS

 ?

PM

Progressive 3D mesh.

TEXTURE

A 2D texture which can be applied to a surface of a 3D object.

TRK

Usually found with a .GND file, contains information about the trackwork of a layout.

TSO

Trackside Object. The variations in a layout that are required for a specific scenario, for example extra trackmarks and triggers.