Clones array, a mini-tutorial

[raghukamath]

Excellent tutorial.

@lehko

After that you can merge the whole group, and finally place your window pattern on the building with transform>perspective (here I help myself with two vanishing points, also an useful tool).

It is is also possible to add the original and the array inside a group layer and add a transform mask to it. to preserve the original and arrays so that you can paint or make changes to it later.