Quote - There is an option called "Render over:" in posers render settings. That should get rid of the white border and it doesn't matter which background color your preview has as long as you render with "Render over: Black"

Yeppers!! I remember I had the same issue when I first started. Turns out the trick is rendering over black.  You still get a pixel border, but because it's black, it looks more like a shadow.

If you are rendering something mostly white render over a lighter colour because rendering over black will give you an ugly black border around the white.  A good tip for when you are rendering wedding gowns :)

And save your image as a .png.  You don't have to worry about using masks to remove the background.

"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