@ unbroken-fighter, confused m8 the citygen I have is adding some basic mats all done with the nodes as far as I can see, dunno where it gets the images its using but it does dump them in the temp folder, i tried adding some cycles nodes(emitoutput) but so far have only made the whole building into a light lol.

pic shows the city rendered (done nothing to that) and the (BI)nodes from one of the mats, not archivis lol but ok for a bit of background as is

I'm not too clever with the BI nodes yet an then cycles are slightly dif again, one day my little bits of knowledge will merge into understanding this proggy but theres so much to learn ;-)