Customizable dual message illusion for OpenSCAD. A different customizable message will be visible depending on the viewing angle. The message orientation may also be customized (i.e. horizontal, vertical, diagonal). As for the base plate, it may either be placed on the bottom, on back for wall mounting, or completely removed altogether.
I saw roboticide's model and really liked the concept, so I decided to make a parametric version in OpenSCAD. The original concept comes from LLOYDHOPANDA's I LOVE YOU FOREVER in Thingiverse.
OpenSCAD is a free software that facilitates parametric 3D modeling. If you are unfamiliar with OpenSCAD, I really encourage you to try it out. Just follow these steps to start generating your own custom models:

The author remixed this model.