The Answer.

Also, just having fun trying out a some 3D CAD and printing ideas. More versions on the way.

This one : 42 Dots

This print was inspired by the PseudoIsochromatic Plate Color Vision Test (see example in the photos); curiously enough one of the plates in this test features the number 42. This print is not intended to be pseudoisochromatic, but I was curious to see how the pattern of random dots would print out. The result was not quite what I was expecting, but did turn out to be very interesting. I think this method would be a good way to obtain a random rough textured surface when that is wanted.

Unfortunately the photos do not really convey the way this print looks and feels. This one is worth printing out just to see and feel the result.

Easter egg : How many times does the rim pattern repeat?

OnShape 3D CAD files :

https://cad.onshape.com/documents/ba9b5a674c35f531c6091552/w/fac7b14fb8ab587841758478/e/bffa2c24a56a062df89f87ce

Print instructions

Print this in PLA in colors (via filament switching) using the 3mf file provided; otherwise :

• infill 0% concentric top and bottom
• perimeters = 6

This print really requires two colors to show the effect. I used orange for the background with transparent red on top to make the effect more subtle.

Note : When you generate gcode with this using the slicer, expect it to take more time than you are used to - it is a small print but there is a very large amount of detail.