STEP 4: Fill in the gaps

- Uncheck the ‘Enable Orbits' checkbox on the Orbits tab of the Rollup.

- With the brush Paint tool still selected, change the nib shape to square and the nib size to 40 on the Property Bar.

- Paint over all of the white area to the left of the line with black. Don't leave any gaps or holes, but don't paint over any of the right hand edge of the original line (Fig 4).

STEP 5: Displacement

Note: The torn edge needs to be fairly rough and chaotic. I have used the displacement filter to assist us here.

- From the menu, click ‘Effects/ 2D Effects/ Displace'.

- Load the ‘Sand.pcx' displacement map. Change the settings to: stretch to fit, repeat edges, horizontal=7, vertical=0, then press OK. (You may experiment with these settings if you wish but I found that increasing the vertical level created unwanted holes in the black area.)

- The left edge of the black area may be affected by the displacement filter. If so, repaint over this area with the black paint brush so that all of the left hand half of the image is completely black (Fig 5). Also, if too high a horizontal level has been used for the displacement, black spots may appear in the white are. These should be erased using the eraser tool (with a small nib size) if necessary.

STEP 6: Make the tile seamless

Note: When using an image as a tile, it needs to be seamless. We use the Offset filter to create a seamless tile. It is much better to use this tool now on a relatively simple object, than later after the fills have been added. With a vertical tear such as the one created here we only need to ensure that the top and bottom of the image weld together seamlessly when tiled; we can ignore the horizontal offset level.

- Click ‘Effects/ 2D Effects/ Offset'. Change the settings to: horizontal=100, vertical=50, (when shift value as % is selected), and wrap around selected. Click OK (Fig 6).

- After the offset filter is applied, check again that no white spots have appeared within the black area. If so, just paint them black.

- This may be a good time to save the image as a .cpt file if desired.