A machine learning tool now exists to detect Photoshop face warping!

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Sheng-Yu Wang et. al. have developed a ML tool to identify images that have been edited using Adobe Photoshop’s face aware liquify tool, a common tool utilised to warp facial features. The ML algorithm outperforms humans in identifying edited images and can even determine where editing has taken place in the image. I'd highly recommend checking out their works it's all fascinating.