Describe the bug
Polyvinyl Chloride, Polybenzimidazole, Polyethylene, Polycaprolactam, Polytetrafluoroethylene have extruding recipes which turns dust into other form.
However, Polyvinyl Butyral and Polyphenylene Sulfide don't.
(polydimethylsiloxane has no ingot form so it is ok)

Versions
master branch 3b1f165

Setup
dev environment