Phantasm CS Tutorials: Halftone

This tutorial aims to use vector halftones in various ways to produce a bank note theme.

Along the way, it will be using the Halftone Filter and Effect tools present in Phantasm CS range, as well as the Levels and Curves color editing tools. There will be no need to exit Illustrator to perform additional tasks.

It also makes use of the Live Trace tool introduced in Illustrator CS2 as well as the Envelope Distort function which will be used to help generate the background halftone wave effect.

The final image may be previewed below:


Stage 1

The basis of this artwork is a panorama of a beautiful French bridge. The original high-resolution image is reduced in size and presented here:

To download the image (copyright Astute Graphics Limited, 2008), please click here.

Create a new CMYK document, 22.22 x 7.22 inches, and place this image within it, ensuring that it is embedded as opposed to being linked and that it is scaled to fit the page size fully.

Select the image within the Illustrator document and open the Live Trace window (Object » Live Trace » Tracing Options...). The options chosen were based on the "Color 16" default, but with Max Colors set to 32. Select Trace to produce a vector version of the image and expand the trace to ensure that it is purely vector (Object » Live Trace » Expand).

The reason the image is being vector traced is to allow for warping in segments, which will be covered next.


Stage 2

Because we are looking for repeated waves in the halftone effect to better emulate the security design found on many banknotes, we need to split the traced artwork into sections so that each may be warped individually.

Before we proceed to creating the design, we first need to check that an image can be warped and then "unwarped". The reason for taking these steps is that the Haltone tool is able to produce straight "line cut" type results, but not in a wave form. Therefore, by first warping the artwork, applying the Halftone and then "unwarping", the result should be a wavy Halftone.

To demonstrate this, take a look at the following image (zoom to enlarge). You may also download the original Illustrator file by clicking here...

From this test, it is proved that a "Flag" Envelope distort of +8% can be brought back to its original form by re-applying at -6%.

The next step is to divide the traced image into blocks, each to produce one wave cycle. In this example, it was decided to produce 6 waves. To divide this up, a new layer was created and a rectangle was drawn exactly over the traced image (this is easily done if View » Smart Guides are enabled). The rectangle was then made 1/6th of its width by using Illustrator Transform palette (the aspect ratio "chain" was disabled and "/6" was typed at the end of the width value and Enter pressed).

The rectangle was then duplicated so that six copies fitted perfectly across the document. (The method chosen and shown above was to create a blend between two such rectangles at each end, with 4 steps specified. But equally, this could have been done manually.)

The rectangles were then ungrouped so that they could be selected individually.


Stage 3

Duplicate the layer containing the traced image (the six rectangles should be in a separate layer) and then copy the left-hand rectangle and place it in exactly the same location in the new duplicate layer.

In this example the duplicate layer was renamed simply to "1" as other copies will follow. You may also wish to lock the other layers (the original traced image and the rectangles layer) while performing the following task...

Select the duplicate traced image (which should be a group) and the copy of left-hand rectangle and then click on the Pathfinder palette's Crop button whilst holding Alt down (this automatically expands the pathfinder operation).

This may take a short while to process.

The result should be a segment of the traced image, the size and location of the left-hand rectangle.


Stage 4

With the resultant segment of the traced image selected, open the Warp Options window (Object » Envelope Distort » Make with Warp...). Opt for Style: Flag, ensure Horizontal is selected, a bend of +8% and no Distortion. OK this.

The Illustrator file showing the stage may be downloaded by clicking here...

Before continuing, expand this warp (Object » Envelope Distort » Expand) so that it may be re-warped later.


Stage 5

Apply a Halftone live Effect (Effect » Phantasm CS Designer | Studio » Halftone...) to the warped artwork as shown below:

The settings for this Halftone may be downloaded by clicking here...


Stage 6

To revert the distorted image, an opposite warp is applied.

With the Halftoned artwork selected, open the Warp Options window once more (Object » Envelope Distort » Make with Warp...). Opt for Style: Flag, ensure Horizontal is selected, a bend of -6% and no Distortion. OK this.