If you already resized the image it might change the dimensions since your render size may not be the window size.

You can always try bringing in a new background image and then making sure the box is ticked with the new image.  If that doesn't work then putting it on a flat plane is your best bet.

I've never had a problem bringing in a background image without resizing in a paint program and I've been using Poser since ver. 4.

Hugz from Phoenix, USA

Victoria

Remember, sometimes the dragon wins. Correction: MOST times.