I wanted to try Rangers of Shadow Deep one weekend so I needed d20 dice. I added a small chamfer to "Deliberately unfair (and fair) d20 dice" by Amatulic (https://www.thingiverse.com/thing:4853423), so it rolls a bit better.

Chamfering was performed in Fusion360.

It was painted post-print with a simple method: I applied plenty of paint to one number, then wiped off the excess.

The glowing one was a not perfect print, what I salvaged by drilling it, converting into a Christmas ornament. 

I printed it scaled 70% on Anycubic Photon with Anycubic Translucent Green resin. Sliced in Chitubox, light supports at the density of 90%. It printed well, but I needed to sand two sides slightly to remove the residues of supports.