.IRRMESH File Extension
What is an IRRMESH file?
Mesh file created by Irrlicht, an open source 3D engine written in C++; written in the XML format; contains mesh data which is linked to nodes contained in .IRR files that are referenced by Irrlicht to create game scenes; mesh data includes bounding box descriptions and parameters for vertices and indices.
To create an .IRRMESH file in Ambiera CopperCube, select the mesh of your object, select File → Export → Save selection as Irrlicht Mesh..., name your file, choose the save location, and click Save.
NOTE: Mesh files like IRRMESH are used to create the shape of objects in 3D engines, which render the objects for gameplay.