oooo.... try shrinking the scale of the city blocks - it worked for me =D  had to take individual scale down to .01 to do it, reduced density a LOT, and reduced umm... cant think of the word, but its in the same spot where the individual object/plant/whatever you insert into the ecosystem is...- and then it looked like a kid dropped a buncha skyscrapers onto the scenery - it was all jumbled and mishmashed and made no sense.

holy smokes, that IS huge...

Rarer than a hairy egg and madder than a box of frogs....

< o > < o >    You've been VUED!    < o > < o >
         >                                                     >
         O                                                    O