tiled boxes effect?

Hey, got a question about this effect, used here in these icons by andemaiar and nicole_anell.

and

Any tips on how to achieve the tiled/overlapping boxes look of the first icon, the Riley icon? The closest I've been able is to physically chop up a stamped blinds-brush layer into squares and manually tile them around, but then the diagonals never line up and it just looks choppy and awkward. I've been able to sort of fake kung-fu my way toward the overlapping strips of the second icon, but the Riley one eludes me.

Is this just one particular 100x100 brush that I don't have? Or a set of said? And if so, does anyone know where to find them?

But I believe that it's probably a layered effect, particularly the second (River) icon, which seems to have overlapping strips of stamped layers at varying opacities and with varying filters, yes?

Either way, a tutorial on how to achieve these effects would be greatly appreciated!