In Illustrator CS5, you can easily draw or render artwork in perspective using a feature set that works on established laws of perspective drawing.
Perspective grid allows you to approximately represent a scene on a flat surface, as it is naturally perceived (by the human eye). For example, a road or a pair of railway tracks, which seem to meet or vanish in the line of vision.
The following features in Illustrator facilitate drawing in perspective:
Utilities to define or edit one, two, and three vanishing point perspectives in a document.
Control different perspective-defining parameters interactively.
Create objects directly in perspective.
Bring existing objects in perspective.
Transform objects in perspective (move and scale objects).
Move or duplicate objects toward a perpendicular plane (perpendicular movement).
Define real work objects and draw objects with the specified real world measurements in perspective.
For a video on perspective drawing, see www.adobe.com/go/lrvid5205_ai_en.
A. 1-point perspective B. 2-point perspective (default) C. 3-point perspective
To select one of the default perspective grid preset, click View> Perspective Grid and then select from the required preset.
To define grid settings, click View > Perspective Grid > Define Grid. In the Define Perspective Grid dialog box, you can configure the following attributes for a preset:
Select the type of preset: One Point Perspective, Two Point Perspective, or Three Point Perspective.
Select the units to measure the grid size. The options are centimeters, inches, pixels, and points.
Select the grid scale to view or set the artboard and real-world measurements. To customize the scale, select the Custom option. In the Custom Scale dialog box, specify the Artboard and Real World proportions.
Imagine a cube in such an orientation that no face is parallel to the picture plane (in this case the computer screen). Viewing Angle is the angle which the right face of this imaginary cube makes with the picture plane. Therefore, the viewing angle determines the positions of the left and right vanishing points from the observer. A viewing angle of 45° implies that the two vanishing points are equidistant from the line of vision of the observer. If the viewing angle is greater than 45°, then the right vanishing point is closer to and the left vanishing point is farther away from the line of vision and vice versa.
Specify the horizon height (observer’s eye level) for the preset. The height of the horizon line from the ground level is displayed in the smart guide readout.
Third Vanishing Point
This option is enabled when you select the three-point perspective. You can specify the x and y coordinates for the preset in the X and Y boxes.
To change the colors for the left, right, and horizontal grids, select the color from the Left Grid, Right Grid, and Horizontal Grid drop-down lists. You can also select a custom color from using the Color Selector as well.
Use the Opacity slider, to change the opacity of the grid.
To save the grid as a preset, click the Save Preset button.
To edit grid presets, click Edit > Perspective Grid Presets. In the Perspective Grid Presets dialog box, select the preset to edit and click Edit.
The Perspective Grid Preset Options dialog box opens in edit mode. Enter the new grid setting and click OK to save the new grid settings.
You cannot delete the default presets. To delete a user-defined preset, click Delete in the Perspective Grid Presets dialog box.
Illustrator also allows you to import and export user-defined presets. To export a particular preset, click Export in the Perspective Grid Presets dialog box. To import a preset, click Import.
Illustrator can create only one grid in an Illustrator document. You can move the grid across artboards using the Ground level widget while the Perspective Grid tool is selected, to place it at the required position.
You must select the Perspective Grid tool to perform this task because the ground level widget is not displayed if this tool is not selected.
You can manually adjust vanishing points, grid plane controls, horizon height, and cell size using the respective widgets. However, these widgets are only visible with the Perspective Grid tool selected.
To adjust the left and right vanishing points use the left and right vanishing point widgets. Notice that the pointer changes to a two-way arrow pointer () when you move the pointer over the vanishing points.
While adjusting the third vanishing point in 3-point perspective, holding down the Shift key constrains the movement to vertical axis.
If you lock the station point using the View > Perspective Grid > Lock Station Point option, then both the vanishing points move together.
You can also adjust the left, right, and horizontal grid planes using the respective grid plane control widgets. The pointer changes to a two-way arrow (, ) when you move the pointer over the grid plane controls.
Holding the Shift key while moving the grid planes, constrains the movement to the extent of cell size.
If you shift the origin, the x and y coordinates of the horizontal plane and the x coordinate of vertical planes are affected. When you select an object in perspective while the grid is visible, the x and y coordinates displayed in the Transform and Info panels change with shift in origin. You can also see the change in coordinate measurements when you draw objects using the rectangle or line group tools and press Shift, while the relevant grid plane is active. If you move the mouse over the origin, the pointer changes to .
If you move the ruler origin, you can see the station point.
A. Station Point B. Changed Ruler Origin
Adjust horizon height to fine-tune the observer's eye-level. When you move the pointer over the horizon line, the pointer changes to a vertical two-way arrow .
You can change the grid extent to define the extent of the grid on the planes. When you move the pointer over the grid extent widgets, the pointer changes to .
Gridlines are set to display onscreen when there is a 1-pixel gap in them. Progressive zooming in brings in view more gridlines that are closer toward Vanishing Point.
To increase or decrease the grid cell size, use the grid cell size widget. When you mouse over the grid cell size widget, the pointer changes to .
When you increase the grid cell size, the number of grid cells reduce.
To draw objects in perspective, use the line group tools or rectangle group tools while the grid is visible. While using the rectangle or line group tools, you can switch to the Perspective Selection tool by pressing Cmd (Mac OS) or Ctrl (Windows).
You can also switch the active plane using the keyboard shortcut 1 (left plane), 2 (horizontal plane), and 3 (right plane) with these tools selected.
The Flare tool is not supported with Perspective Grid.
When you draw an object in perspective, use Smart Guides to align the object to other objects. The alignment is based on the perspective geometry of objects. Guides appear as the object approaches the edge or anchor point of other objects.
You can use numerical values for any of the rectangle or line group tools (other than the Flare tool). You can specify height and width values for the object in the same way as you would draw in regular mode, but the object is drawn in perspective in this case. Also, the values represent real world dimensions of the objects.
While drawing in perspective, you can use the regular shortcuts available for drawing objects such as Shift / Alt+drag (Windows) or Option+drag (Mac OS).
While drawing in perspective, objects can be snapped to grid lines of the active plane. An object snaps to the grid lines within 1/4th distance of the cell size.
You can enable or disable the Snap to Grid option from View > Perspective Grid > Snap to Grid.This option is enabled by default.
For a video on drawing artwork in perspective, see www.adobe.com/go/lrvid5211_ai_en.
If you have already created objects, Illustrator provides the option to attach objects to an active plane on the perspective grid.
To add an object to the left, right, or horizontal grid:
Using the Attach to Active Plane command does not affect the appearance of the object.
For a video on mapping artwork to perspective, see www.adobe.com/go/lrvid5212_ai_en.
If you want to release an object with a perspective view, click Object > Perspective> Release with Perspective option. The selected object is released from the associated perspective plane and is available as a normal artwork.
Using the Release with Perspective command does not affect the appearance of the object.
When you bring an existing object or artwork into perspective, the appearance and scale of the selected object changes. To bring regular objects into perspective, do the following:
Use the Perspective Selection tool to select objects in perspective. The Perspective Selection tool provides a marquee to select objects using the active plane settings.
You can select between normal marquee and the perspective marquee after starting to drag using the Perspective Selection tool and then switch between different planes of the grid using 1, 2, 3, or 4 keys.
To move objects in perspective, switch to the Perspective Selection tool (Shift+V) and then either use the arrow keys or the mouse to drag-and-drop objects.
During the drag loop while moving the objects, changing the plane using the respective keyboard shortcut changes the object's plane.
You can also move objects in perpendicular direction to the current object location. This technique is useful when creating parallel objects such as the walls of a room. For this movement:
Keeping the number 5 key pressed, drag the object to the required position. This action moves the object parallel to its current location. Using Alt (Windows) or Option (Mac OS) along with the number 5 key while moving, duplicates the object at the new location without changing the original object. In Draw Behind mode, this action creates the object behind the original object.
The arrow keys do not work when you move objects in perpendicular.
Use the keyboard shortcut, Alt+drag (Windows) or Option+drag (Mac OS) to copy the object. To constrain the movement in perspective, press Shift+drag. To specify a precise location where you need to move the object during perpendicular movement, see Precise perpendicular movement.
You can also use the Transform Again command (Object > Transform > Transform Again) or the keyboard shortcut Ctrl+D (Windows) or Cmd+D (Mac OS) to move objects in perspective. This option also works when you move object in perpendicular direction.
The keyboard shortcut 5 for perpendicular movement and the keyboard shortcuts 1,2, and 3 for plane switching while drawing or moving objects, work only from the main keyboard and not from the extended numeric keypad.
To move objects in precise perpendicular movement, double-click the required plane widget using the Perspective Selection tool. For example, double-click the right plane widget to set the options in the Right Vanishing Plane dialog box.
You can also move objects in perpendicular direction by dragging the grid plane using grid plane controls. When you move an object in perpendicular direction, the object is placed parallel to its existing or current location.
To move an object parallel to its current position:
The automatic plane positioning feature allows you to create objects by inferring the height or depth of the object. For example, to draw a cube, the height of the top face of the cube must be known. With automatic plane positioning, perspective grid automatically adjusts the horizontal grid plane to match the height of the top face of the cube.
Other objects by going to one of the anchor points (getting the anchor label) and pressing Shift, which temporarily hides other planes.
Grid lines by going to the intersection point and pressing the Shift key. Changing plane in this state brings that plane to the selected offset.
Once the object is drawn or placed, the inference mode is reset and all planes are restored to normal visibility.
Using the automatic plane positioning options, you can select to move the active plane temporarily when you mouse over the anchor point or gridline intersection point by pressing the Shift key.
The automatic plane positioning options are available in the Perspective Grid Options dialog box. To display this dialog box, double-click the Perspective Grid tool icon in the Tools panel.
When you want to draw or bring objects in perspective at the same depth or height as an existing object, select the existing object in perspective and click Object > Perspective > Move Plane to Match Object to bring the corresponding grid to the desired height or depth. You can now draw or bring new objects in perspective.
You can scale objects in perspective using the Perspective Selection tool. While scaling objects in perspective, the following rules apply:
Scaling is done in the object’s plane. When you scale an object, the height or distance is scaled based on the object’s plane and not the current or active plane.
For multiple objects, scaling is done for objects that are on the same plane. For example, if you select multiple objects on the right and left plane, then all the objects that are on the same plane as the object whose bounding box is used for scaling, are scaled.
Objects that have been moved perpendicularly, are scaled on their respective plane and not the current or active plane.
You cannot directly add text and symbols to a perspective plane, when the grid is visible. However, you can bring text or symbols into perspective after creating them in normal mode.
To bring text or symbols in perspective, do the following:
The Edit Text option is available in the Control panel and under the Object > Perspective menu. In addition, you can edit text in isolation mode or by double-clicking the text object.
A. Edit Text B. Edit Perspective C. Isolate Selected Object
The Edit Symbol option is also available in the Control panel and under the Object > Perspective menu. In addition, you can edit a symbol in isolation mode or by double-clicking the object.
Depending on whether you are editing a symbol or text, the options in the Control panel change to Edit Symbol or Edit Text.
A symbol instance in perspective is the same as an expanded symbol instance. You can edit a symbol definition just as you would edit the symbol definition of a flat symbol instance. However, a symbol definition cannot contain art types that are not supported in perspective such as raster (images), non-native art, envelope, legacy type, and gradient mesh.
Functionalities such as replacing a symbol, breaking link when expanding the a symbol instance, and reset transformation do not work on symbols in perspective.
As a workaround to replacing a symbol instance, you can Alt+drag (Windows) or Option+drag (Mac OS) a symbol instance in perspective and leave it over the symbol in the Symbols panel. However, make a copy of the symbol before replacing the symbol instance because when you drag the symbol instance, the previous symbol instance is permanently deleted from your document.
You can edit or modify text in the same way as is done in the normal mode. For more information, see Creating text.
You can configure the Perspective Grid settings using View > Perspective Grid. The options available include:
This option shows the ruler division only along the true height line. The gridline every determines the ruler division.
Snap to Grid
This option allows snapping to gridlines while bringing in perspective, moving, scaling, and drawing in perspective.
This option restricts the grid movement and other grid editing using the Perspective Grid tool. Only the visibility and the plane position can be changed.