Yeah, but City Generator is kinda naff though! Much better to make a greyscale image yourself in some paint program (everybody should have at Microsoft Paint installed on their Pc, use that if you aint got nothing better). You could make an image just like the one posted above easily and quickly in Bryce using terrains, but you probably already knew that Zhann.

As for real Greebles in Bryce, its not possible unless your name is Rj001!!!