# Command line arguments

When launched with no command line argument, Material Maker will start with an empty project.

When launched with the path of a .ptex file as command line argument, Material Maker will start with this project file. Material Maker can thus be associated to files with .ptex extension so double-clicking on them will directly open them.

Material Maker can also be used to export several .ptex file with the following command line:

> material_maker –export-material –target <engine> -o <output_path> <input_files>

Where:

- engine is the target engine (Godot, Unity or Unreal)

- output_path is the path where files will be generated

- input_files is the list of input files (wildcards are accepted)