You can 3D print stuff on diffraction gratings to produce the same effect: https://learn.adafruit.com/3d-printing-on-diffraction-grating-sheets https://learn.ad

You can 3D print stuff on diffraction gratings to produce the same effect: https://learn.adafruit.com/3d-printing-on-diffraction-grating-sheets https://learn.adafruit.com/3d-printing-on-diffraction-gratin...