If you look at the image, the house is divided into colored pieces and guide you see the colors match.
I used to determine the size of the pieces that I’ll cut the different pieces of modeling.
Also in relation to size, resolution value lightmaps objects once exported to unreal.
On occasion it may be necessary to vary the value of a block, but for the beginning of modeling helps you extructurar the cutting.
I could not even finish this job, is stopped for the moment, but will continue along next week.
Greetings.