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shadow maps A shadow map is a bitmap that the renderer generates during a pre-rendering
pass of the scene. Shadow maps don't show the color cast by transparent or translucent
objects. On the other hand, shadow maps can have soft-edged shadows, which ray-traced
shadows cannot.
Shadow mapped shadows provide softer edges and can require less calculation time than
ray-traced shadows, but are less accurate. On the Advanced Render Settings palette, shadow
mapped shadows are active when Shadow Map is turned on.
ShapeManager ShapeManager is the Autodesk technology that provides 3D solid modeling
to AutoCAD and other products.
shortcut keys Keys and key combinations that start commands; for example, Ccommand-S
saves a file. The function keys (Fn-F1, Fn-F2, and so on) are also shortcut keys. Also known
as accelerator keys.
shortcut menu The menu displayed at your cursor location when you right-click your
pointing device. The shortcut menu and the options it provides depend on the pointer
location and other conditions, such as whether an object is selected or a command is in
progress.
sky The background color of the drawing area when perspective projection is turned on.
The sky displays with a color gradient between the sky horizon (nearest to the horizon) and
the sky zenith (opposite the horizon). See also ground plane.
smooth shading Smoothing of the edges between polygon faces.
smoothness A property of mesh objects that controls the roundness of the object. Objects
with higher levels of smoothness have more faces, or tessellations.
snap angle The angle that the snap grid is rotated.
snap grid The invisible grid that locks the pointer into alignment with the grid points
according to the spacing set by Snap. Snap grid does not necessarily correspond to the visible
grid, which is controlled separately by GRID. (SNAP)
Snap mode A mode for locking a pointing device into alignment with an invisible rectangular
grid. When Snap mode is on, the screen crosshairs and all input coordinates are snapped
to the nearest point on the grid. The snap resolution defines the spacing of this grid. See
also Object Snap mode. (SNAP)
snap resolution The spacing between points of the snap grid.
solid history A property of a solid that allows you to see and modify the original forms of
the solid.
solid object An object that represents the entire volume of an object, for example a box.
1618 | Chapter 51 Glossary