.MATERIAL File Extension

File used by Rigs of Rods, an open source truck, car, airplane, and boat simulator; contains nested instructions and properties that reference a particular 3D model, such as a truck, to a texture file; specifies textures that are declared in a corresponding .TRUCK file.

NOTE: Valid texture files are in .PNG, .JPG, and .DDS formats, and DDS is the recommended format.

A MATERIAL file is a material used by Godot Engine, an open-source game development engine. It contains properties that control how light interacts with a 3D object. Some 3D scene creation tools, such as Blender, create MATERIAL files when a user exports a Godot Engine scene.

Video game developers use Godot Engine to create 2D and 3D video games. These games are comprised of one or more scenes. Often, developers create scenes outside Godot Engine and then import them. Scenes created outside Godot Engine may use internal materials, stored in the scene file, or external materials, stored in separate MATERIAL files.

For example, the Godot Blender Exporter allows developers to export scenes as .ESCN files. If a developer selects Generate External Material while creating an ESCN file, Godot Blender Exporter saves the scene's materials in separate MATERIAL files. The developer must then import these MATERIAL files into Godot Engine along with their ESCN file.

You can import the material a MATERIAL file contains into Godot Engine (multiplatform). To do so, review Godot Engine's documentation for importing scenes with separate materials.