Print with 100% infill, white filament works very well (transparent filament works sometimes) and a dark filament is not worth trying.
After it's printed, hold it against a light. It's based on the second image from here:
The file is relatively large, don't surprised. The preview on the photo is noisy because my build platform is actually PCB with holes, so my bottom of the prints has a lot of dots which requires post processing, which on the photo was not done yet.
The better print/photo is done by https://www.thingiverse.com/TheInternet/about