Open the file scratches.psd and place this within your illustration. Using the Polygonal Lasso tool, make a selection around some of the shapes. Go to Edit > Define Brush Preset, enter a name and select OK. Repeat this process with other shapes and add some extra scratchiness with the paint brush tool.
Open the file city.jpg, and use the same process as in step one. Select Image > Adjustments > Threshold to create a contrasting black-&-white image, then go to Edit > Transform > Perspective and drag the cursor out to get a fantastic cityscape effect. I have also repeated the process with an image of a helicopter.
Now it’s time to get away from the screen. I love to age my work, and to do this you need to make some grungy layers. Put a tea bag in a small amount of hot water and then apply to a sheet of A4 paper. Once dry, scan it in, then crumple up your paper and scan it in again for a different look. It’s messy, but fun. The scanned objects are included on the cover CD with the names PAPER.jpg and PAPER2.jpg.