JunkyBob,

Oh yeah. That sounds like how'd I have a go at it.

So, I'd UV map 1/4 of the wall and vent and do a UV snapshot
I'd color fill the right part of the texmap & save it
I'd then go back and UV map the whole wall
Apply a new material with the texmap assigned to colour
Then just adjust the material's place2dTexture node so that the image is repeated 2 times in each direction.

But if the only problem so far is the flowers, perhaps you could increase the repeat count?

Simon

Hey, don't you actually have a max texture size of 1024(u) x 1024(v) x 4(RGBA) = 4Mb?