I'm attempting to make a simple cube. But it's not so simple, 'cause it needs to have a different imageTexture on the top and bottom faces than it does on the sides. (Think of a square log; the sides have the bark, the top and bottom show the rings.) I've tried using individual indexedFaceSet faces, individual Rectangle2D nodes, and even 6 Box elements, each offset just a hair from the origin. I've gotten each of these approaches to display as desired in X3d-Edit and freeWRL, but ShapeWays rejects every one. See attached arghh.x3d, treebark.png, and treetop.png -- Any assistance or suggestions would be most welcome!