There are several native file types associated with Poser:
Prop: This file type contains information about a prop including source geometry, materials, texture and other maps, etc. Prop files have the extension PP2. Magnet files are prop files with a pre-positioned magnet as the prop. Props are often supplied as PP2 files with embedded OBJ information. They may also include texture and bump map files.
Camera: Camera files contain camera information including location, direction, focal length, etc. They have the extension CM2.
Light: These files contain information on lights, including type, position, color, and other attributes. Light files have the extension LT2.
Hair: Hair files contain information on hair props and are similar to prop files. This file type has the extension HR2. Hair files may have the geometry embedded within them (as opposed to in a separate OBJ file).
Face: Face files contain information required to articulate and/or deform a face to the desired expression and have the extension FC2.
Hands: Like face files, hand files contain information required to articulate hands into the desired positions or gestures. Hand files have the extension HD2.
Pose: Pose files contain information required to articulate an entire figure into the desired position, which can include face and hand information. Pose files have the extension PZ2.
Character: A character file contains all information required for a Poser character including reference geometry, Joint Editor palette morph targets, materials, default pose, etc. These files have the extension CR2.
Scene: This file type is what is created when you create a Poser scene and select File > Save within the Poser animation. This file type contains all of the information found in the above-mention files plus details on movie, background, rendering, animation set, lights, cameras, figures, and other information. Poser scene files have the extension PZ3. They are similar in structure to CR2 files.
Material Collections: A Material Collection is a fully integrated file format, which stores groups of materials from a single figure for access through the Library palette. Material Collection files have the extension MC6/MCZ.
External Binary Morph Targets: Poser saves morph targets to an external binary file format, which contains only the morph targets for a particular figure or scene. These files have the extension PMD.