The following code will let you take an image… let’s say a photograph and slice it up into a bunch of tiles that can be saved and printed.

Step 1: Create a ‘render comp’ that is the size of the print you will want (ie. for a 4″x6″ print @ 300dpi, you would set the comp to be 1200px X 1800px) (this script assumes a framerate of 24fps)

Step 2: Place your photo/image/precomp into this render comp.

Step 3: Paste the following as an expression into the image layers’ ‘Anchor Point’ property…

compWidth = thisComp.width;

compHeight = thisComp.height;

srcWidth = width;

srcHeight = height;

countX = Math.ceil(srcWidth / compWidth);

countY = Math.ceil(srcHeight / compHeight);

centerOffsetX = (srcWidth%compWidth)/2;

centerOffsetY = (srcHeight%compHeight)/2

frame = time*24;

xCount = Math.ceil(srcWidth / compWidth);

yCount = Math.ceil(srcHeight / compHeight);

indexX = frame % xCount;

indexY = Math.floor(frame/xCount);

half_height = compHeight/2;

x = compWidth*indexX;

x += centerOffsetX;

y = compHeight*indexY;

y += centerOffsetY;

[x,y]

Step 4: Step through the render comp frame by frame and you should see the image moving to a new position each frame, that will seamlessly stitch back together. Render out an image sequence and send them off to the printer!