I just tonight learned that d18's were not only a thing, but a thing that dates back quite a while and it got me wondering about why modern roleplaying games, with all their unusually numbered dice, don't seem to make any use of them.
Is it an oversight? Is it because it's considered too close to the d20 to make a difference? Is it because its not a platonic solid? Are they more expensive to manufacture than the other shapes? Is there some other reason?
Anyone have any info on this?
EDIT:
And on a tangentially related note, how come RPGs use d3's but not d5's; it seems like those should be the same principle as each other; one's a d6 divided by 2 and rounded up, the other's a d10 divided by 2 and rounded up
Is it an oversight? Is it because it's considered too close to the d20 to make a difference? Is it because its not a platonic solid? Are they more expensive to manufacture than the other shapes? Is there some other reason?
Anyone have any info on this?
EDIT:
And on a tangentially related note, how come RPGs use d3's but not d5's; it seems like those should be the same principle as each other; one's a d6 divided by 2 and rounded up, the other's a d10 divided by 2 and rounded up