Quote - Acadia, my problem is the white around the figure does not show up in poser in the preview or the render. My problem is When I save it as a PNG and then open it in PSP and add a new layer behind the figure layer.

Yes, that's right. The reason for it is because of antialising. A bit of the background colour bleeds into the figure causing the border you see. It happens with all images and all background colours.  

You were rendering over light grey (poser is defaulted to render of the  current preview window background colour which is light grey), which meant that the light grey was bleeding into the image you were rendering, so it left a 1 or 2 pixel border of grey around you image.

Try rendering a figure wearing all white, and when you render pick "render over black".  Then when you save the image and open it in PSP, put it over a white background. You will see a black pixel border around the white outfit.

You don't need to change the background colour inside the poser preview window.  You just need to change the setting in the render settings when you are about to render, to use "black" when rendering.  Even if you have your poser preview window set to light grey, blue or white or whatever,  Poser will use your "render over" colour choice as the colour it renders over top of.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi