Compressed material information file used by Poser's rendering engine; contains textures that can be applied to 3D models created with Poser; accessible only from the Library within the Material Room. Learn what a MCZ file is, how to open a MCZ file or how to convert a MCZ file to another file format. We collect information about file formats and can explain what MCZ files are. When a package is available in more than one format, the files are zipped together into a single zip file. Before attempting to open an MCZ file, you'll need to determine what kind of file you are dealing with and whether it is even possible to open or view the file format.