You'll find that no matter how good the texture. ( check out my Seriously Real Materials if you are prepared to pay for such. . . ) the problem area will be where the wall meets the ground. It won't look right. You may have to use some small terrains to break up the straight line or use a single stretched finely bumpy fractal terrain with a very low Y setting instead of the ground plane. messes with your lovely clean lines though. . . ;-) You need something dry and dusty with some sparse straggly vegetation, greece is a hot dry place, mostly anyway. cheers, Jonathan ps nice building!