  We introduce a method to generate 3D scenes that are disentangled into their
component objects. This disentanglement is unsupervised, relying only on the
knowledge of a large pretrained text-to-image model. Our key insight is that
objects can be discovered by finding parts of a 3D scene that, when rearranged
spatially, still produce valid configurations of the same scene. Concretely,
our method jointly optimizes multiple NeRFs from scratch - each representing
its own object - along with a set of layouts that composite these objects into
scenes. We then encourage these composited scenes to be in-distribution
according to the image generator. We show that despite its simplicity, our
approach successfully generates 3D scenes decomposed into individual objects,
enabling new capabilities in text-to-3D content creation. For results and an
interactive demo, see our project page at https://dave.ml/layoutlearning/
