PMD (not PMB) is "Poser Morph Data" file created when "Use external binary morph targets" is checked. All of the morph deltas are stored in a binary format PMD file instead of in a text format in the Poser file (PZ3, etc.). The advantage is that each floating point value in binary format only occupies 4 bytes where as a complicated text value, like 5.09782340987e-10, takes up a byte for each character (17 bytes in the example). The disadvantages are like those mentioned and, of course, makes using the file impossible in earlier Poser versions as well as the need to remember that this auxiliary file now exists (and must be carted around with the Poser file for morphs to continue to work).

C makes it easy to shoot yourself in the foot. C++ makes it harder, but when you do, you blow your whole leg off.

 -- Bjarne Stroustrup

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