Files that contain the .mdx file extension are most commonly associated with the Warcraft III gaming application.
Warcraft III is a real-time strategy game. Players enter the world of Azeroth and build bases and control units to take over territory. The MDX files that are used by this game store the 3D game model and details about the textures and meshes for the units that are used by the game players.
The MDX files that are installed on a user's computer can be the standard files that are provided by the gaming application or they may contain customized 3D models that have been created using a 3D modeling editor. Custom files are often used to enhance a user's gameplay experience.
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If you have additional information about the MDX file format or software that uses files with the MDX suffix, please do get in touch - we would love hearing from you.