As far back as Poser 5 they have been no longer required but some content vendors (starts with a 'D') still use .rsr and Mac resources in their products (and considering that MacOS 10.5 is trying to wipe their continued use out completely).  Luckily, Poser converts them to png for us. :)

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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