I designed these Soma polycubes in OpenScad in order to make them parametric and customisable. The complexity of the code is in SomaPolyCubes.scad and people with no knowledge of OpenScad can just change a few parameters in the Print3Doma.scad file that has no clutter.

Unit cubes can be cubes, rounded cubes or chamfered cubes to your liking.

The file produces a ready to use layout of 7 pieces ready to import in a slicing program like Cura.

I'll be printing one soon at "les inventeurs", on their Ultimaker2+. http://lesinventeurs.paris/latelier/