We introduce Infinigen, a procedural generator of photorealistic 3D scenes of the natural world. Infinigen is entirely
procedural: every asset, from shape to texture, is generated
from scratch via randomized mathematical rules, using no
external source and allowing infinite variation and composition. Infinigen offers broad coverage of objects and scenes
in the natural world including plants, animals, terrains, and
natural phenomena such as fire, cloud, rain, and snow. Infinigen can be used to generate unlimited, diverse training
data for a wide range of computer vision tasks including
object detection, semantic segmentation, optical flow, and
3D reconstruction. We expect Infinigen to be a useful resource for computer vision research and beyond.