A little peek in the how-tos for this very big barbicane.
The barbicane’s gate leads to a circular place that is 45 meters diameter. It’s a very wide place with a ground pavement made of cobblestones.
Of course i could make it from a huge texture ( say at least 4K for acceptable, though too low details ) but i gonna try anotrher way.
It is explained here: Special unwrapping problem
I want to use this map:
for mapping the entire place…
Of course we’ll see repeats on the ground but i’ll make changes ( as there are in real city ) and will use dirtmaps to break the repetition…
Here are some steps of the thing beeing done:
make a divided plane. each of its square has the same UV !!!
and extrude the place you want to fill with those squares.
Knife cut the thing and delete useless parts:
then move the perfectly cut thing in place…
and enjoy the result:
The ugly lines you see are due to the normalmaps that are not leaked around the texture.
Here’s for fun the UV view 
( please move non of those verts as you’ll never be able to put them in place again
Here it is. i hope i can make all this nicer ! That’s what am trying to do this evening 
Hope you like it !
happy blending 