Apply pattern on polysurface?

Hello everyone,

I'm working on a facade model for an architecture project and here's how it looks so far. I managed to divide the curved surface of the wall and then apply a polysurface on the grid, just like "tiles", but what I'd like to do now is repeat this pattern but on each face of the polysurface itself. I tried to explode the polysurface to be able to divide each face individually but it doesn't seem to work. I basically want to make several iterations in a brussels sprout fashion. Any ideas on how I could obtain this result? I hope this explanation was clear enough.

Thank you in advance,

Vince