Copyright Goodheart-Willcox Co., Inc. Chapter 17 Materials in AutoCAD 465 The Interpolation property controls the transition of colors from one node to the next. Transitions are applied to the nodes from left to right, regardless of the node number. The options are: • Ease in. Shifts the transition closer to the node on the right. • Ease in out. Shifts the transition toward the node, but it remains more or less centered on the node. • Ease out. Shifts the transition closer to the node on the left. • Linear. This is the default. The transition is constant from one node to the next. • Solid. No transition between nodes. There is an abrupt change at each node. The Position property is simply the position of the selected node in the ramp. The node on the left is at the 0 position and the node on the right is at the 1.000 position. Nodes in between will be at varying values between 0 and 1.000. You can also change this value by dragging the nodes left or right. Picking the Invert Gradient button reverses all color values, inverting the gradient pattern. In effect, the ramp is fl ip-fl opped from left to right. Noise may be added to the gradient map to create an uneven appearance. The properties in the Noise and Noise Threshold categories are similar to those for the noise map. The noise map is described later in this chapter. The properties in the Transforms, Position, Scale, and Repeat categories are the same as described for an image map. Refer to the Image section for details on these properties. Tiles A tiles map is a pattern of rectangular, colored blocks surrounded by colored grout lines. This may be the most versatile map in the whole collection. Tiles are used to simulate tile fl oors, ceiling grids, hardwood fl oors, and many different types of brick A B C D Figure 17-27. There are 11 different gradient types available for use in a gradient map. The four shown here are applied to the same object with the same lighting and mapping coordinates. A—Linear asymmetrical. B—Box. C—Diagonal. D—Light normal. A full-color image is provided on the companion website. www.g-wlearning.com/CAD/