It is amazing how much an invitation from the White House can speed up development. Long hours this weekend went into getting a working airbrush prototype. While paint brushes will remain the primary mark making device in the Neural Jet, it will be cool to have them backed up by five airbrushes with the ability to quickly paint backgrounds.
Also cool that we went with the servos instead of something like a solenoid to control air flow. With our servos we can actuate the air coming out to 16 different pressures. So mixing becomes possible, and since we have 5 airbrushes on the paint head, the Neural Jet will be able to paint over 1,000,000 colors (16^5). Yeah this part of the project really is just re-inventing a printer, but coupled with the other mark making tools that are coming, it will be on the next level. You can see the prototype in action below.