The following assets were taken from Horizon Zero Dawn:

terrain1.bof and terrain2.bof contain the 'Mothers Heart' scene
convex_hulls.bin contains point clouds used as the source for convex hulls
heightfield1.bin contains a single 'tile' of terrain data
Human.tof and Human/*.tof contain the Aloy ragdoll setup and a couple of sample animations mapped onto the ragdoll

Permission was granted by Guerrilla Games to release this under the same MIT license as the rest of the project.