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That is really odd.
Try opening a new file and appending in the models. That can fix odd bugs from accidental strange key presses for example.
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I would check your mesh in the neck of the pin.
do you have hidden geometry?
more then one mesh object in your pin?
i think it’s an Eevee shadow configuration problems. like shadow clip start 1.4 m?
Try rendering in Cycles is shadow is good, then check shadow related properties for eevee.
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That looks funny but did you check where the problem was? Was it with Eevee or the mesh?
1 Like