Looks like you changed your shadow color. Check the color at the bottom right of the document window to make sure you haven't accidentally changed it from the original.

Nope, that's not it. I already checked that.

Do you have shadows enabled under Render Options in the Render menu?

Well, I finally just closed Poser then opened the file again, and it rendered the shadows just fine. Weird.

If you change the focal length of the camera you are rendering from, you can ameliorate the way the columns appear to lean in (a fish-eye effect). Try setting it to at least 100, but you might have to go even higher to straighten them out. Carolly

Carolly - Thanks for the tip, but that isn't my actual shot. I only used that pic to show the shadow weirdness.

... camera set to about 55 is close to what the human eye sees. Less than this value starts looking "fish eyed." More than this value starts to "flatten out." I usually switch between 24 ---> 55 ---> 110 depending on the effect that I want. ;=]

There are bugs in Poser, one of which seems to cut out shadows. I have PZ3 file of a sunlight simulator. It works okay, but if I add the lights to another scene - no shadows. I just got some Pro pack Python scripts for light management which allow you to remove all lights from a scene before adding new ones and these have helped.