That’s not the only use of the technique though, and perhaps one of the simplest is to use a 3D-printed mould for casting concrete. It’s what [ArtByAdrock] is doing in their latest video ...

Prepare for the DIY by stacking buckets or plant pots ... good hack is to wet it first), then drape it over the mold. Brush on extra concrete, as needed, and arrange the fabric into pleats.

In this Episode of HomeMade Modern Ben Uyeda shows how to use Lego bricks to make the mold for a DIY concrete nightstand.

Mold-making veterans will tell you that release agent is a must and in this case rubbing the insides of the molds with wax made it a snap to pry the wooden forms off of the set concrete.