have DL the trial,installed, started - all good ...
But if i try to load an example City, the load process take a long time, sometime i see an landscape, then the screen goes "black" and back (looks like the GPU reset) and the prg hangs.Only kill the CityEngine Task help.
Win7pro-64 - Lenovo S20 with 6 core Xeon CPU
16GB DDR3 RAM - ATI firepro V8700 1GB RAM
Other Major CGI apps run fine (Maya2013/Vue2014/Zbrush..) and all 3D Games too.
Latest available driver for the ATI card.