That is awesome. I can't wait to see the STL files people make so we can all print them up!
Meanwhile, here is a single mirror illusion STL file and a video showing off how similar illusions work https://www.thingiverse.com/thing:1970522 You can play with the STL in 3D and get a bit of an idea of how it works.
The linked STL is a different Kokichi Sugihara illusion - by the same creator as this new class of illusions, and part of a body of work in this field that this appears to be a continuation of.
But it is. Those are objects that are mirror symmetric, and the apparent direction they're facing depends on viewing angle, creating the illusion that they haven't actually been mirrored.
Meanwhile, here is a single mirror illusion STL file and a video showing off how similar illusions work https://www.thingiverse.com/thing:1970522 You can play with the STL in 3D and get a bit of an idea of how it works.