The phrase "Solid"

[eneroth3]

@simoncbevans

PS Perhaps SU should refer to “boxes” rather than solids as that would surely be more accurate.

SketchUp solids (aka closed surfaces) can have any shape, not just a box.

@simoncbevans

Solid Inspector definitely does find reversed faces as well as other things that prevent an object conforming to the definition of a solid.

In my experience even the solid inspector struggles with separate surfaces representing holes within a solid.