**yvonnesnet:
**
Have just found a way to render with background image in P4 mode.

Load the image as normal.... in Display settings.. click on show background image...  click on use Background shader node.... then... in P4 Render Settings... select Render Over: Current BG shader...

You will get the image in preview mode, BUT... you have to switch off show background image before you render.

PS. Just found that it will also render if Render Over: Background picture is selected in P4 settings... and Use Background shader node is clicked off...the key thing is to switch off show background image prior to rendering.

"You don't have to be mad to use Poser... but it helps"