Short answer is, you work real hard and release quality work, establish a good rep and generate repeat custom.  It helps if you do something nobody else does, too.  Custom morphs are one way, original models are another.  Why d'ya think I'm going hell for leather to learn modelling?  Much as I love texturing, the sets only sell for so long.  Models tend to have a longer lifespan and a higher perceived value.

Answering your second question, yes, there's a market for Poser art but it's mainly to adult sites.  There are a couple of artists I know of who make and sell porno comics to adult sites.  From my own limited experience, making comics of any kind in Poser is damn hard work.

Coppula eam se non posit acceptera jocularum.

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