Crit Dice — d6 / d12 / d20 whose top face is a sword, bow or staff

Nine dice. Three solids — d6, d12, d20 — each drawn with three different crit faces: a sword, a drawn bow, or a staff.

Every face except one is an ordinary numeral, so you never decode a glyph to read a roll. Only the top face is a picture. The roll that matters is a piece of gear.

What You Get

d6 at 16.0 mm, d12 at 18.0 mm, d20 at 20.0 mm — each in sword, bow and staff.

Pick one glyph across a whole set for a class set: all sword for a fighter, all staff for a mage, all bow for a ranger. Or take the mixed set — d6 bow, d12 staff, d20 sword — which reads as an adventurer's kit rather than three copies of a logo.

Fair Dice

Opposite faces sum to 7 / 13 / 21, derived from the solid's antipodal face pairing rather than typed in by hand. Centre of mass of the engraved die sits within 0.023 mm of centre on every one of the nine.

Print at 40 percent infill or more. Uneven infill is what actually makes a printed die roll badly — not the engraving.

Two Colours From One File

Each die also ships in a two-colour version, named with a 2c suffix — crit_d20_sword_2c.stl. That is one file holding two named solids. Import, right-click, Split to Parts, assign a filament to each.

Filling the engraved pockets flush with the same polymer puts back the material the engraving removed, so the two-colour die is the fairer of the two — the casino flush-paint trick, in filament.

No AMS? Print the plain file, crit_d20_sword.stl, instead. Same die, engraved, single colour.

Print Notes

d6 flat on a face, no supports, no brim. d12 flat on a pentagon, no supports, no brim. d20 flat on a face, use a brim — a raw icosahedron rests on an edge and would tip over, so the model already rotates a whole face onto the bed.

About 4.8 / 4.9 / 6.2 g per die single-colour, so roughly 16 g for a three-die set.

If you print the two-colour version, print the whole plate at once. Purge is paid per layer that contains both colours, and because numerals live on every face the ink appears at nearly every height. Three dice cost about what one costs, and nine cost about what one costs. Printing them one at a time pays the full purge bill every time. Dark ink on a light body is both the cheaper purge direction and the one that hides its own residue.

The .scad is included and is fully standalone — no external libraries, no imported SVGs. Change the size, swap the glyph, or set glyph="arrow" for a fourth one no shipped file uses.