addDefaultMaterials() {

		// Add default main triangle and line edge materials (used in pieces that can be colored with a main color)
		this.addMaterial( this.parseColorMetaDirective( new LineParser( 'Main_Colour CODE 16 VALUE #FF8080 EDGE #333333' ) ) );
		this.addMaterial( this.parseColorMetaDirective( new LineParser( 'Edge_Colour CODE 24 VALUE #A0A0A0 EDGE #333333' ) ) );

		return this;

	}
Initializes the loader with default materials.

@return {LDrawLoader} A reference to this loader.