I am part of a development team on the art side, and specifically environments. I have various building kits that can be mixed and matched. However rectangular models such as this window have nasty seams. Now the trade off is that the bricks have the appropriate texel density. Previously this was not the case BUT in that…
I don't think you need expensive shaders rendering a model 3 times, or extra geometry to hide the seam unless you are REALLY married to the brick pattern? It seems like the way the bricks are stacked/bonded, that they aren't going to tile well. Make your life easier and switch the bond to something simple like "running…
..or use a triplanar projection shader ..or make the brickswall tile at thrids as well ..or blend in the "other" side - just look at how they did it on dishonored2 http://polycount.com/discussion/184711/dishonored-2-environment-art-dump just some quick ideas :D
You could combine the two walls/windows into one asset that has seamless UVs. Or modify the design of the wall and incorporate something to hide the seam. A column, a pipe, etc.