Create a crystalline looking roll dice to your flavour. The general shape is two polygonal pyramids encasing the numbered, triangular faces in between. All numbered faces are of equal geometry, making the dice fair.
Customizer will let you pick D6, D8, D10, D12, D14, D16, D18, D20 shapes, adjust the height of the top/bottom pyramids and the numbered faces. Select a font and pick your text for each numbered face.
Resulting model is sitting on its side flat for easier printing.
Dice can be printed with 0% infill, however, if you're in for a heavier dice, you may want to increase the infill.