Figure 4.22 - Copies with two Arrays

That is the easiest way to get a matrix style set of copies.

4.4.1 Arrays and reference objects

Besides using values to control an Array's distance, you can also use an

object to set ranges and even rotations for any Array. It could be an

existing 3d Model from your scene or a helper object like an Empty from

Blender.

An Empty is a unique type of object in Blender that will not appear

during rendering. It works only as a helper for modeling, animation, or

any other task that requires a reference object.

You can create an Empty using the SHIFT+A key and choose Empty

with the option Plain Axis for the most straightforward Empty (Figure

4.23).