Turns out you can roll a 7 on a d6
but only once.
so obviously the full sides count as their value, the half sides (if the die lands vertically) count for half their value, and the inside counts as zero.
let's estimate the probabilities as 30% for the big faces and 10% for the small ones
then the distribution of possible sums is as follows:
0: 9%, 1: 15%, 1.5: 6%, 2: 7%, 2.5: 11%, 3: 3%, 3.5: 7%, 4: 3%, 4.5: 2%, 5: 1%, 6: 9%, 7: 12%, 7.5: 3%, 8: 3%, 8.5: 3%
the expected value for the left half is 1, and for the right half is 2.5.


























