The progress is noticeable from the original to the newest one, but I think, that the circles still dont look smooth at all.
Maybe you could try changing those black pixels (the ones on the sides, alone) into the next darkest green, and the ones next to it into a lightest green (if you get what I mean).
(Actually they looked much more smooth on the earlier version, you just had to change the black ones alone into a green there)
And some inner AA around the borders of the die could help.
But coming good.
Uhmm... I was kind of bored, and tried to do a die myself too :0
