LegoBrickMatrixCopier

From fmepedia

This transformer complements LegoBrickCreator transformer allowing matrix-like copying of the original brick along X, Y, and Z axes. Spacing along X and Y is specified in stud units, along Z - in plate heights (one brick is three plates high). The color of the brick can be either preserved, or changed randomly within a set of 11 predefined colors.

Click this link to see the output of the example workspace (the latest version of Adobe Reader (http://www.adobe.com/products/acrobat/readstep2.html) is required).

Another useful LEGO transformer is LegoBrickOffsetter.