[lpelizzari]

I have the geometry of an airplane cut in half, like this:

To generate the fluid domain in Spaceclaim, I have to create a rectangle around the geometry at the plane of symmetry and then extrude it (correct me if I'm wrong).

The problem with that is, when I fill the remaining face of the geometry like this:

it creates a not-flat surface, which absolutely ruins the fluid domain generation step.



It is barely noticeable here, but you can see the surface bulges out just a little bit.

When I try to cut one surface from the other, it actually works, but it creates a hole in the fluid domain.

How do I generate an actually flat surface in this situation?