Files that contain the .txd file extension are most commonly associated with game texture dictionary files. These files are small bitmap images that create an archive of different textures that can be used within an associated gaming application.
The TXD files that are associated with a gaming program are commonly referenced by the games and other applications that support the Renderware 3D engine. TXD files can also be mapped onto 3D objects in order to change their appearance.
Grand Theft Auto and Tony Hawk's American Wasteland are just two of the popular gaming applications that use the TXD file format.
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If you have additional information about the TXD file format or software that uses files with the TXD suffix, please do get in touch - we would love hearing from you.