Pros: Fully customizable, super trippy. Cons: The usual Kickstarter small-team caveats.
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That's a supremely amusing typo!an array of RBG LEDs
It's not a typo if we follow the original intent of the writer!That's a supremely amusing typo!an array of RBG LEDs
Can you roll it 1000 times or so and post the results of the rolls? I'm curious about the balance.
Yeah, I saw that. But I'd like actual data from a random production unit. I'd also like to see more statistics than they've got in those graphs.Can you roll it 1000 times or so and post the results of the rolls? I'm curious about the balance.
I was curious about that too; they have that data on their website: https://images.squarespace-cdn.com/cont ... rmat=1500w
It's probably crap, but the dirty little secret of TTRPGs is that all gaming dice are pretty crap. Even brands like Game Science that tout their exacting specifications in the name of balance produce randomly biased dice. The most fair dice are those made for casinos, which take into account the relative densities of both the die body itself and the putty used to fill in the pips. Gaming dice don't typically go that far.Can you roll it 1000 times or so and post the results of the rolls? I'm curious about the balance.
Conclusions
1. All dice are unfair because they cannot be precisely manufactured with uniform density and dimensional correctness. However, the number of rolls required to detect the unfairness of a casino die manufactured to a few ten thousandths of an inch tolerance is very high.
2. It is very difficult to manufacture D20s that will test fair in 3000 rolls. This includes both plastic and metal dice.
3. Though our sample was small, there appears to be some merit to measuring the diameters of D20 dice; a die with a maximum diameter difference of less than 0.12 mm has a good chance of testing fair in 3000 rolls.
4. Float testing dice may tell if the die is unbalanced but it will not tell which side or sides will roll with higher or lower probabilities.
5. The manner in which a die is rolled makes a large difference in the face probabilities. It varies with surface and the manner in which it is rolled, that is, dice cup to felt, drop from a height to a hard surface, or rolling in a dice tower.
6. Rolling D20 dice 100 times and using the obtained chi square values to judge relative fairness is statistically unjustifiable.
7. A D20 die must be highly unfair to be detected in a few hundred rolls.
8. The exact probability distributions for unfair dice are not asymptotically a chi square distribution.
Easy with the pitchfork, Plato.they'll eventually come in other popular polyhedral flavors (6-sided, 10-sided, etc.).
Guessing that's a typo, if not what use is there for a die that isn't a regular polyhedron?
they'll eventually come in other popular polyhedral flavors (6-sided, 10-sided, etc.).
Guessing that's a typo, if not what use is there for a die that isn't a regular polyhedron?
For regular tabletop use I don't think it's very important with balanced dice. I don't even mind playing with cheap or home made novelty dice that are heavily biased one way or another if it's just with my friends because there's a good chance you'd never know if you weren't keeping a record of the rolls.It's probably crap, but the dirty little secret of TTRPGs is that all gaming dice are pretty crap. Even brands like Game Science that tout their exacting specifications in the name of balance produce randomly biased dice. The most fair dice are those made for casinos, which take into account the relative densities of both the die body itself and the putty used to fill in the pips. Gaming dice don't typically go that far.Can you roll it 1000 times or so and post the results of the rolls? I'm curious about the balance.
There's a rigorous lab test here. It also seems to indicate that the float test isn't a valid one.
The upside is that their unfairness usually only manifests after many thousands of rolls, not a few hundred or even one thousand.
Conclusions
1. All dice are unfair because they cannot be precisely manufactured with uniform density and dimensional correctness. However, the number of rolls required to detect the unfairness of a casino die manufactured to a few ten thousandths of an inch tolerance is very high.
2. It is very difficult to manufacture D20s that will test fair in 3000 rolls. This includes both plastic and metal dice.
3. Though our sample was small, there appears to be some merit to measuring the diameters of D20 dice; a die with a maximum diameter difference of less than 0.12 mm has a good chance of testing fair in 3000 rolls.
4. Float testing dice may tell if the die is unbalanced but it will not tell which side or sides will roll with higher or lower probabilities.
5. The manner in which a die is rolled makes a large difference in the face probabilities. It varies with surface and the manner in which it is rolled, that is, dice cup to felt, drop from a height to a hard surface, or rolling in a dice tower.
6. Rolling D20 dice 100 times and using the obtained chi square values to judge relative fairness is statistically unjustifiable.
7. A D20 die must be highly unfair to be detected in a few hundred rolls.
8. The exact probability distributions for unfair dice are not asymptotically a chi square distribution.
And when someone does that, you absolutely know which way that roll is about to go"No, give me that other die, I'm not rolling with this one again!"![]()
Or if they preface it with "Don't fuck me, Gil!"And when someone does that, you absolutely know which way that roll is about to go"No, give me that other die, I'm not rolling with this one again!"![]()
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I'd also like to see more statistics than they've got in those graphs.Can you roll it 1000 times or so and post the results of the rolls? I'm curious about the balance.
I was curious about that too; they have that data on their website: https://images.squarespace-cdn.com/cont ... rmat=1500w
But... why N-sided die? Once you've put the electronics inside, why not just
- use a 6-sided die - of no particular "balance" (who cares if one side is more likely "up")
- allow each side to display "any" number (e.g. 0-99)
- permit the Owner to set the die to a range (e.g. 1-31)
[or even multi-die ranges (e.g. modelling the sum of 2 seven-sided dice plus a 13-sided one)]
- use the electronics to randomize an answer within that range
- and display the answer on all sides
With this you get The Universal Die, true (okay, Pseudo-) randomness, and the Joy (?) of throwing the die (or dice if you can afford several).
Yeah, 'haven't played those games for decades....
Very clever!But... why N-sided die? Once you've put the electronics inside, why not just
- use a 6-sided die - of no particular "balance" (who cares if one side is more likely "up")
- allow each side to display "any" number (e.g. 0-99)
- permit the Owner to set the die to a range (e.g. 1-31)
[or even multi-die ranges (e.g. modelling the sum of 2 seven-sided dice plus a 13-sided one)]
- use the electronics to randomize an answer within that range
- and display the answer on all sides
With this you get The Universal Die, true (okay, Pseudo-) randomness, and the Joy (?) of throwing the die (or dice if you can afford several).
Yeah, 'haven't played those games for decades....
It's probably crap, but the dirty little secret of TTRPGs is that all gaming dice are pretty crap. Even brands like Game Science that tout their exacting specifications in the name of balance produce randomly biased dice. The most fair dice are those made for casinos, which take into account the relative densities of both the die body itself and the putty used to fill in the pips. Gaming dice don't typically go that far.Can you roll it 1000 times or so and post the results of the rolls? I'm curious about the balance.
There's a rigorous lab test here. It also seems to indicate that the float test isn't a valid one.
The upside is that their unfairness usually only manifests after many thousands of rolls, not a few hundred or even one thousand.
Conclusions
1. All dice are unfair because they cannot be precisely manufactured with uniform density and dimensional correctness. However, the number of rolls required to detect the unfairness of a casino die manufactured to a few ten thousandths of an inch tolerance is very high.
2. It is very difficult to manufacture D20s that will test fair in 3000 rolls. This includes both plastic and metal dice.
3. Though our sample was small, there appears to be some merit to measuring the diameters of D20 dice; a die with a maximum diameter difference of less than 0.12 mm has a good chance of testing fair in 3000 rolls.
4. Float testing dice may tell if the die is unbalanced but it will not tell which side or sides will roll with higher or lower probabilities.
5. The manner in which a die is rolled makes a large difference in the face probabilities. It varies with surface and the manner in which it is rolled, that is, dice cup to felt, drop from a height to a hard surface, or rolling in a dice tower.
6. Rolling D20 dice 100 times and using the obtained chi square values to judge relative fairness is statistically unjustifiable.
7. A D20 die must be highly unfair to be detected in a few hundred rolls.
8. The exact probability distributions for unfair dice are not asymptotically a chi square distribution.
SCOTUS dice!That's a supremely amusing typo!an array of RBG LEDs
It really could. WHY NO VIDEO, Ars?The article could really benefit from a video showing those custom PNG patterns in action.
On the Kickstarter campain site as well as the website of the creator.Where is a video of what happens when rolling them?
Where is a video of what happens when rolling them?
...obsessive nerds
...wait a minute -Pretty neat idea. But this remains my favorite d20:
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Pretty neat idea. But this remains my favorite d20:
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...sounds like they're inductive-charging wirelessly-programmable cores cast in resin, so no, but the loads are probably intermittent and light-enough to be very gentle on the battery life...One thing I really would like to know, especially with the price of these dice: Is the battery replaceable? After charging them regularly for 1-2 years, I can see those batteries dying. Are you then out of luck, or can you open up a die and replace the battery?
I would guess at a lifetime of about 1000 charging cycles before the battery capacity would drop below a usable charge per gaming session. So probably a fair number of years, depending on how often you play.One thing I really would like to know, especially with the price of these dice: Is the battery replaceable? After charging them regularly for 1-2 years, I can see those batteries dying. Are you then out of luck, or can you open up a die and replace the battery? I do not expect some kind of no-soldering-required replacement, but if you cannot even open up the dice because they are glued shut, that would be annoying.
One thing I really would like to know, especially with the price of these dice: Is the battery replaceable? After charging them regularly for 1-2 years, I can see those batteries dying. Are you then out of luck, or can you open up a die and replace the battery? I do not expect some kind of no-soldering-required replacement, but if you cannot even open up the dice because they are glued shut, that would be annoying.
I remain unconvinced about the Pixels, but at least their failure mode is "inert lumps which still function perfectly well as dumb dice".But... why N-sided die? Once you've put the electronics inside, why not just
- use a 6-sided die - of no particular "balance" (who cares if one side is more likely "up")
- allow each side to display "any" number (e.g. 0-99)
- permit the Owner to set the die to a range (e.g. 1-31)
[or even multi-die ranges (e.g. modelling the sum of 2 seven-sided dice plus a 13-sided one)]
- use the electronics to randomize an answer within that range
- and display the answer on all sides
With this you get The Universal Die, true (okay, Pseudo-) randomness, and the Joy (?) of throwing the die (or dice if you can afford several).
Yeah, 'haven't played those games for decades....
One thing I really would like to know, especially with the price of these dice: Is the battery replaceable? After charging them regularly for 1-2 years, I can see those batteries dying. Are you then out of luck, or can you open up a die and replace the battery? I do not expect some kind of no-soldering-required replacement, but if you cannot even open up the dice because they are glued shut, that would be annoying.
Per the FAQ on the kickstarter, the dice are sealed resin encasing the internals and the batteries are not replaceable. The battery life on a single charge will depend on how fancy one gets with the animation. I appreciated Sam's heads up that the charge decays when not in use, and hope that is addressed.
Sometimes One is too busy asking, “How?” That they forget to ask, “Why?”