The Quick Start Guide provides a short overview of the CityEngine's user interface and workflow possibilities. The guide the quick way to learn to use the CityEngine and efficiently create your first cityscape.

The CityEngine Manual contains the complete reference to the user interface, the different tools, import and export, magic wizards, and the data structures.

The Tutorials describe step-by-step typical CityEngine workflows with practical examples - and lots of basic aspects of the CityEngine are teached.

You might take the red pill for the CGA Shape Grammar Reference and go straight for the truth.