Jan Vroonhof <vroonhof(a)math.ethz.ch&gt; writes: That's it. There's actually a difference in the management of top and bottom shadow pixmaps (welcome to motif): those resources are defined in the XmPrimitive widget class. the XmNbottomShadowPixmap is bound to XmUNSPECIFIED_PIXMAP by default, whereas XmNtopShadowPixmap is computed dynamically. I think this is because XmPrimitive inherits directly from Core, which defines the XmNborderPixmap resource, and this resource is used in the topShadowPixmap computation (not in the bottomShadowPixmap one). --XmNdidier