Abstract: This specification discloses methods and systems for generating a biome within a virtual landscape of a video game. The biome has at least two layers. The system includes a computing device programmed to execute a plurality of programmatic instructions that, when executed create a first visual layer that is defined by a set of first rules having a first set of visual characteristics and adding one or more second visual layers, where the one or more second visual layers is programmatically distinct from the first visual layer, the one or more second visual layers automatically abides by each of the set of first rules, the one or more second visual layers automatically adopts each of the first set of visual characteristics, and the biome is made of a combination of the first layer and the one or more second visual layers.