I am modelling a helmet.
I have the single surface of the helmet fine- just need to thicken it (2mm).
It will not thicken (or offset) at all.
The radii of curvature are large and I have tried smoothing the shape as much as possible (as well as shelling from a solid and other things).
Please help me out any way you can, I have a limited time to do this!
images and file attached