To be honest, the boxes only happen, when I replace Poser's ball geometry resource by a box geometry. Poser has 4 simple on board geometries (ball, ground, 2 light icons). 'ground' displays the ground plane, 'ball' is used for the spherical falloff zones (not for the magnet/wave zones, which use the ball prop geometry). The 'lightIcons' are the light arrows displayed in the document window. They are 'l' (line) elements, like the tree maker hair, so they are visible in the document window, but not rendered (fortunately, IMHO).