These modules create a displayable image from a renderable object or modify the visual characteristics of the object(s) being displayed. For example, Normals and FaceNormals could be used to add shading to a geometrical structure created with RubberSheet (Realization category), while Light and AmbientLight could be used to change its default lighting.

• AmbientLight -- Produces an ambient light. You can specify the color of the light. Ambient lights illuminate a surface equally, regardless of direction, so an object illuminated only with ambient light is not shaded. Note that it is not necessary to specify an ambient light, because a small amount of ambient light is built into the object model. However, explicitly specified lighting overrides the default lighting.

• Arrange -- Creates a single image from a collection of images. You can specify how many images to put in a row.

• AutoCamera -- This module produces an appropriate camera as input to the Render or Display module. Specifying a "look-from" direction changes this default camera. The width of the image in model units (orthographic projection) or the field of view (perspective projection), or the image size and aspect ratio can also be changed.

• Camera -- Produces a camera for input to the Render or Display module. You can specify the "look-to" point, the "look-from" point, the width of the image in units corresponding to those in the data, the image size, and the aspect ratio. Camera differs from AutoCamera in that it specifies a "look from" a point instead of a direction.

• ClipBox -- Clips an object using a box. You can specify the box explicitly, as the two corners defining a box, or it can be the bounding box of an object. The module renders only that part of the object inside the box. The Render, Display, or Image tool actually performs the clipping.

• ClipPlane -- Clips an object by a plane. The user specifies the plane with a point and a normal. The side of the plane the normal projects into is the side that will be clipped (i.e., not displayed). The Render, Display, or Image tool performs the clipping.

• Display -- Renders and/or displays an image to the screen. If a camera is not provided, the Display module expects the first input to be an image (e.g., the output of Render or Arrange).

• FaceNormals -- Computes normals on a surface. When you use the FaceNormals module, each face of the surface is flat-shaded.

• Image -- This tool renders and displays an image to the screen. It performs like the AutoCamera and Display modules combined. Using the Image tool to render an image enables many direct interactors that are not available when using AutoCamera and Display. These options are available in the View Control option of the Options pull-down menu in the Image window.

• Light -- Produces a distant point light. You can specify the direction and color of the light. Note that it is not necessary to specify a light, because there is a default light built into the object model; however, explicitly specified lighting overrides the default lighting.

• Normals -- Computes point or face normals for shading a surface. For example, you can use this module to produce shading on rubbersheets and boundaries. However, shading on an isosurface is smoother if you use the gradient shading options built into the Isosurface module.

• Overlay -- Overlays two images. The result is a new image that can be displayed using the Display module. The new image is a pixel-by-pixel sum of the two images, where (1 - blend) attenuates the base-image pixels, and (blend) attenuates the overlay-image pixels, ( blend is a value between 0 and 1). You can also perform chromakeying by specifying blend as an RGB color or as a string specifying a color.

• Render -- Renders an object and creates an image. The object can be any combination of volumes, surfaces, lines, and points, and you can clip the object. You need to provide a camera to the Render module to specify the viewing direction.

• Reorient -- Rotates or inverts an image or a group of images.

• Rotate -- Rotates an object around specified axes. The Render, Display, or Image tool actually performs the rotation.

• Scale -- Changes an object's dimensions along the x, y, and z axes. The scaling is actually performed in the Render, Display, or Image tool.

• Shade -- Allows you to specify object-shading parameters such as specularity.

• Transform -- Moves, rotates, and resizes an object. The Render, Display, or Image tool actually performs the translation.

• Translate -- Moves an object along the x, y, and z axes. The Render, Display, or Image tool actually performs the translation.

• UpdateCamera -- Makes specified alterations to the input camera.