Stuck 4 hours at the train station yesterday, so I drew this entire world freehand with just a ballpoint pen. No pre-sketch, no plan, the story just appeared.
Full story on my blog: https://www.davidrevoy.com/article1134/the-matchbox-kingdom

@mjd Thank you! Oh yes, when I drew that dice, I had a hesitation: I was sure some simple rules were at play. Good to know about the 1 and 6 opposed: they never can appear on the same picture.
I could check that on my phone, but I was really in a situation where I preferred to keep the battery in case I had to book another train, hotel for the night, call relatives, get info, etc...

@davidrevoy @mjd The standard with cubic dice, FWIW, is that opposite sides always add up to 7. So 1 and 6, 2 and 5, and 3 and 4 are opposed.