This is a parametric scad file that lets you to generate tiles of different sizes with several border options.Also included a printable set of rummikub to test the tiles.I used http://www.thingiverse.com/thing:9347 for round corner optionsFor the game tiles: game-tiles.scad files:Rummikub set:Printing: I printed it with 20% infill and 3 solid layers and I can still see the color through the back of the tile when I lift it. Will try to print it denser.I plan to print a set of rummikub with mah-jong sized tiles, and a set of mahjong.