Maze 3 color

This is a simple maze using a BB pellet. First layer is clear, second layer is white, and the third layer is black. You have 2 color changes during the print. Pursa has an article on 3D printed using transparent filaments. ( https://blog.prusa3d.com/3d-printed-lens-and-other-transparent-objects_31231/) It's a good article to get you started. I prefer using clear PVB. The PVB can be smoothed using isopropyl alcohol to get a transparent finish on the bottom. The parts can be printed as one part with filament changes at selected heights or printed in three sections and glued together. Both methods work. 

The whole trick to getting this to work is to get the first layer clear. I print using a .4 nozzle and two layers for the bottom. I can spray the PVB with isopropyl a couple of times and let it set and it comes out clear enough to work for me. I have also found that you can glue PLA to PVB by spraying the PVB with alcohol and putting the two pieces together. When the alcohol dries the two pieces will be stuck together. 

I use a copper .177 BB for the marble in the maze. With the small hole the BB can be inserted after printing.