A mold for making creepers.
So far we've made oogoo castings with good success.
The mold STL file has pixels of 4mm size.
If you want to create custom sized molds, it's best to regenerate them from the scad file.
It's a little fiddly, but you can save a lot of filament by adjusting the margins and creeper placement rather than just scaling the mold STL file.