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The training loss\nis based on features from a facial recognition network, computed on-the-fly by\nrendering the predicted faces with a differentiable renderer. To make training\nfrom features feasible and avoid network fooling effects, we introduce three\nobjectives: a batch distribution loss that encourages the output distribution\nto match the distribution of the morphable model, a loopback loss that ensures\nthe network can correctly reinterpret its own output, and a multi-view identity\nloss that compares the features of the predicted 3D face and the input\nphotograph from multiple viewing angles. 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