Two videos of basic Escher-like optical illusions in wood, from Shop built.
Limited applications here; maybe toys or puzzle boxes. Nevertheless, still interesting to see how it's done, and especially how YouTube videos can enforce perspective illusions. Skip to 2:25 in the first video to immediately see how the illusion is done.
https://www.youtube.com/watch?v=mq4TF3Nnhs0
https://www.youtube.com/watch?v=eqIhUw67oH4
