CHTHONOTRON – a pictorial example

Chthonic Codex: Mysteries & Mystagogues features CHTHONOTRON, which is a pointcrawl generator for the Hypogea. Follow it and you have a serviceable campaign map for you Chthonic Codex campaign, or any similar mythic-caverns-underworld-crazy place with rivers and weird stuff.

So, this is the end result: a map showing canyons in blue, big caves are thick black, narrow caves are fine black. The marks are explained later2014-06-08 17.05.56How did I get there?

Repeatedly tossing 5 dice on the map and tracing a line through them. Starting with the first river:
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Then the second river, flowing into the first. That die went exactly on the other river randomly, when rivers intersect I recommend making them flow into each other, despite theoretically being able to flow over each other, being underground and stuff.2014-06-08 16.06.01And then repeatedly for the caves. First cave, that leads off map because one of the dice went off map:

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Then second cave and third cave.

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And so on. Then I thickened the first caves (they be biiig caves), added more caves, thickened the rivers.

Then I added marks to show distances: but since in this setting you usually walk everywhere, they are marked in time instead of distance. And since I wanted finer granularity in some places, I used marks of different colours: the distance between two black marks is 1 hour, between a green and a black or two greens is 20 minutes. This different granularity is not in the book but it’s a very tiny yet useful hack.

The next step is to populate the caves with the Chthonic Contents section of CHTHONOTRON. I’ll leave that up for later, in another post.