3D printing (no Boolean).
3D printing of objects with holes and cavities without cutting them out in a program for creating 3D models.
Step 1: no Boolean
Cavities and holes in the object without Boolean operations. Boolean operations often mess up the model or even send the computer or program to reboot. Eliminating this unpleasant experience for 3D printing can trick with the inversion of some parts of the thing to be printed. This is shown in the video, its middle part demonstrates how Boolean operations put down the program.