Thanks a thousand Jama for enlighten us! This tool and your way for use it are awesome. I made several attempts to create good cityscapes, i had a lot of problems with the rooftops of the buildings, always looked very noisy and ugly, but at the end i used tiff images of 32 bits for make that. Later i understood that my shapes was too complex, and i made more simple like on the video and worked perfectly. My cities are not very originals, but my goal it was understand the technique well. also i added my previous renders and i recorded a video with parts of the process. Eight days at the end. I hope you like it!