Shell Fail on "simple" object

Here is a shell fail where Rhino returns an open object.

Good luck on solving it, I presume it won’t be easy as the two surfaces are co-planar.

Shell Fail 3 units.3dm (73.4 KB)

Hi Jorgen, I see that thanks- interesting that it cannot, so far, in a solid modeler since these interpret the 2-part plane as a single face.


Perhaps merge the coplaner faces, and try again?

Hi Brenda.
The point is to have the two “ears” sticking out, that’s why that plane is made of two surfaces.
(And yes, for the result I merged them, shelled and booleaned the part away)