'Tom Clancy's Ghost Recon Wildlands' is an open world shooter developed by Ubisoft Paris. It is the biggest action-adventure open world games published by Ubisoft, with the game world including a wide variety of environments such as mountains, forests, deserts and salt pans. A dedicated tool chain and rendering system was designed for this purpose and is now shared among several other projects, this lecture will describe some of the most important technologies behind this work.