carolinebuhagiar

I have tried flipping the normals but it doesn't seem to help. Not sure if you meant something else.

I have a quasi semi-circular object than I am trying to shell by 1mm inwards. The lilac object is what I need it to look like, whilst the purple object is what is happening when I do the command. Anyone have any idea why this is happening and if there is a way I can solve it? Thanks