![](doc1292868939798.image) |
Original model.
Shell fails because the shell thickness offsets through the bottom face of the model
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![](doc1292868939001.image) |
Add an extrude feature to the bottom face of the model to increase the thickness around the area that failed.
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![](doc1292868938705.image) |
Bottom face with extrude feature
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![](doc1292868939330.image) |
To create the shell, remove the faces of the extrude feature and the original bottom face of the model.
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