Animation optical toy

The first result of my research - full 3D printing of animated lenses.
For printing, you need only one transparent plastic and one extruder. No post-press procedures are required.
The image arises and changes due to the optical properties of lenticular forms.
I guess this technology will expand the capabilities of 3D printing.
Two phases of movement are available so far. Nevertheless, in the future I hope to increase the number of stages and improve the quality. I am grateful to the #PrusaPrinters contest, it was during its holding that I got this idea, and I achieved the first results.
Best of all, the effect of changing images is visible on the video: https://youtu.be/tlkkwi2OU2E

Now I laid out the model with a smile (positive changes to negative). Soon I will lay out a model with a skull and a smile, while it can be downloaded on this page https://www.prusaprinters.org/prints/30019-animation-optical-toy