3D View Environment Camera Properties
The Camera page contains the camera field of view, location, and aim properties for the 3D view window.
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Set the camera FOV, position, and target in the Camera page. |
Projection
The projection affects how the three-dimensional model is drawn in the 3D View window. Click the current value in the Projection field and select either Perspective or Orthographic to change how the model is drawn. By default, Perspective is the selected Projection property.
The most distinguishing characteristic of perspective projection is foreshortening: the farther an object is from the camera, the smaller it appears in the final image. Perspective projection emulates the human eye so scenes appear more realistic or lifelike— larger when viewed closely, smaller when viewed from a distance.
The orthographic projection produces a parallel projection with no distortion for distance. As a result, it is sometimes difficult to determine how far an object is from you when viewing it in orthographic projection. This view is useful, however, when you need to measure distances or angles, or exactly align objects in three-dimensional space.
Field of View
The Field of View controls the perspective effect of the 3D view window. The perspective effect is the visual effect of the map changing size relative to the distance from the observer. The Field of View angle is the angle between the left edge of the 3D view window, the viewpoint, and the right edge of the 3D view window. A large Field of view increases the perspective effect, while a small Field of view decreases it. Type a value in the Field of view property field to change the Field of view, or change the Field of view by clicking and dragging the slider 
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Position
The Position section includes the camera position properties: X position, Y position, and Z position. The Position properties update automatically as the camera is moved with the Pan, Trackball, Zoom, or Walk commands. You can also type coordinates into the X position, Y position, and Z position fields to move the camera.
Target
The Target section includes the camera aim properties: X target, Y target, and Z target. The Target properties update automatically as the camera is moved with the Pan, Trackball, Zoom, or Walk commands. The X target, Y target, and Z target values are the coordinates of the point at which the camera is pointing. The Target values also describe the point about which the view rotates when the Trackball command is used.
It is recommended that the camera position is saved with Set Home before modifying the Target properties. The Go to Home command can then be used to return the camera to the default state.