After you render in Poser save the pic as a Tif. It automatically gives it an alpha channel. Bring it into Photoshop an open up the chanels menu and turn on the alpha chanel. You can then use the magic wand to get an exact selection. Go back to RGB mode.Then cut and paste into a new pic and it'll be on its on layer. Hope this helps.

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"The true sign of intelligence is not knowledge but imagination".

Albert Einstein