You mean to say that the mapping of the ground plane goes from planar to cylindrical? That's what it looks like. But only as long as you're using the same material for both? How are you applying the material---manually, or drag/drop? I've seen Vue do some funky things with materials, particularly in the Summary dialog--- sometimes at least there, it helps to change the name of the material. Or maybe renaming a copy of your bitmap or jpg or whatever and applying it to the primitive manually could help. Vue's got some strange quirks, for sure!