A reduced version of the symmetric solids dataset (https://www.tensorflow.org/datasets/catalog/symmetric_solids) initially proposed by [1] where duplicate images (i.e., images with equivalent rotations) and marked shapes are removed. The images are provided unlabelled and resized to 64x64. 

[1] Murphy, K. A., Esteves, C., Jampani, V., Ramalingam, S., & Makadia, A. (2021, July). Implicit-PDF: Non-Parametric Representation of Probability Distributions on the Rotation Manifold. In International Conference on Machine Learning (pp. 7882-7893). PMLR.