torque constructor face flip?

#1 It's been a few years since using those type of tools but you could maybe try this: Make a cube (or whatever shape). Select it. Use the Planar Scale modifier tool and scale the z axis to 0.

#2 While you could try to do it, constructive "solid" geometry is not designed to do this out of the box. Unless there is a tool specific to it, you would most likely be activating a bug if you figure out a way to create and parse invalid geometry.