Thanks for that alternative.

I'll give that a try next time I use a background in the scene.

You are right about weird shadows and stuff sometimes making it look like a wall, so that's why I tend to hide everything and reder the background separately so that it catches the light and then I add the background in post work. That way I don't have weird shadows. I do the same with Cyclorama too most of the time because I get shadows on the back wall part that well, just looks like a shadow on a wall, hehe

Here is the new set up as explained by bagginsbill.  I notice that you don't see the image on the square until you render, which is ok.  If you need  to see the background while building your scene, do what is in this image but also connect the image_map node to the "DIffuse_Colour" node in the Poser Surface area.

Once you have set up your scene, go back and disconnect the "Diffuse_Colour".

Also, you can save yourself some time in the future by saving this set up as a material.

In the material room, click on the plus + sign at the bottom of the library.  Give it a name and save it as a single material.

The next time you want to add a background, just load your square in the Pose room. Go to the material room and look for the material you just saved.  Double click the icon.   Your image_map and poser surface settings will load.  All you have to do then is just browse to your new background image.  And resize the square as needed to meet the dimensions of the image.

"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