[OpenSCAD] vanishing polyhedra on difference?

arnholm at arnholm.org arnholm at arnholm.org
Sat Jul 20 12:28:27 EDT 2019

On 2019-07-20 17:50, A. Craig West wrote:
> I did some experimenting with that, as long as it is consistent,
> openscad does the right thing.

The face normal defines the direction of void ("out of material"). In 
case of an inverted polyhedron with normal pointing inside the volume, 
the material is infinite in all directions except inside the polyhedron 
volume. One should always make sure a polyhedron is properly defined.

Carsten Arnholm

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