A molecular "3D" printer is an advanced fabrication device that allows an object to recreated molecule by molecule. These devices even have the capability to recreate a wide range of chemical bonds and nanostructures, although they cannot deal with quantum effects, stored subatomic particles, or systems with a complex range of chemical bonds not fully described in the devices programming, in addition to materials with anomalous properties or radioactive materials. As such, these devices typical cannot recreate biological systems, although some very advanced versions can achieve limited success within a limited range of simple biological systems. Additionally, incredibly complex technology, such as quantum processors and some metamaterials are difficult or impossible to reproduce. Most molecular printers use pixels as the material input, breaking them down to extract required elements and storing the leftover as waste.
Most molecular printers use pixels as a source for materials, and print based off of ENDI scan files.