Motif is composed of many different widgets such as buttons, sliders, and menus. Conceptually, XRT/3d adds a new widget to Motif. The widget displays 3D data in surface, contour, and bar chart representations. XRT/3d has resources that determine how the graph will look and behave. Writing programs using XRT/3d is very similar to writing any other kind of Motif program; you now have one more Motif widget to use.