Does this help? Poser Formats.
CR2 files are character rigging files. These files contain information about the joints and bones of a figure- where it bends and how much. They also may contain information about morphs that are built into the figure. CR2 files are found in subfolders within the Characters folder inside the libraries folder, which is inside the Runtime folder. Compressed CR2 files have the extension CRZ.
PZ2 files are pose files. They contain information about joint angles, body position and morph values and are applied to figures and props in scenes to control their actions. Poses may contain sequences of actions of varying lengths. PZ2 files are found in subfolders within the Pose folder inside the libraries folder. If compressed, they have the P2Z extension.
NOTE: The PZ2 file format has also been used to manage other aspects of Poser scenes. Two common types of pose file are MAT poses, which apply and change image maps and surface materials, and injection morph files, which add or remove new morphs to figures in a scene. These pose files are also found in the Pose directory but typically don’t contain pose data.
PP2 files are prop files. They often contain geometry data (although they may only contain a reference to an OBJ file containing geometry information) and are stored in subfolders within the Props folder within libraries inside the Runtime. Compressed prop files have the extension
MC5 and MC6 files are material files. These contain information used by Poser’s render engines (especially the Firefly engine) and are only accessible from the Library within the Material Room, unlike MAT poses, which can be used in the Pose Room (but which don’t allow the breadth of effect that material collections provide.) They can be found in subfolders inside the Material folder in the libraries folder within the Runtime folder. Compressed material files have the extension MCZ.
HR2 files are hair files. These may be either strand-based or transparency-mapped hair, and can be found in subfolders inside the Hair folder in the libraries folder within the Runtime folder. Compressed hair files have the extension HRZ.
LT2 files are light set files. These contain lights- spotlights, distant lights, and (in Poser 6) point lights or image-based lights as well. They can be found in subfolders inside the Lights folder in the libraries folder within the Runtime folder. Compressed light files have the extension LTZ.
CM2 files are camera set files. These contain camera positions for the various cameras that Poser uses. They can be found in the Camera Sets folder in the Camera folder inside the libraries folder within the Runtime folder. Compressed camera files have the extension CMZ.
FC2 files are face pose files. These contain morph data for facial poses (expressions and phonemes.) They can be found in subfolders inside the Face folder in the libraries folder within the Runtime folder. Compressed face files have the extension FCZ.
HD2 files are hand pose files. These contain pose data specific to figures’ hands. They can be found in subfolders inside the Hand folder in the libraries folder within the Runtime folder. Compressed hand pose files have the extension HDZ.
PZ3 files are Poser Scene Files. This is the File when you save the Poser Scene you are working on.