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[Dunamisdeos]

Here's a thought: If we're going to modify raws, just give dwarves the ability to grow above ground crops. They can already do it in fort mode, anyway.

Then you can turn off caverns and go nuts.

[Broseph Stalin]

Here's a thought: If we're going to modify raws, just give dwarves the ability to grow above ground crops. They can already do it in fort mode, anyway.

Then you can turn off caverns and go nuts.

That's step one of what I said, you add one line and dwarves can grow above ground crops. Step two is just to give you back underground crops if that's your thing.

[Jazzeraint]

A single cavern layer on a pocket world only has 4 forgotten beasts, so you won't have to worry about too much Fun.

Whoa, how do you know this? Not doubting you, just want to know how / why that's the case, to extrapolate further information on the number of FBs by world size.

[NullForceOmega]

FB population is tied to regions (specifically underground regions.)  So decreasing the number of layers (and therefore regions) decreases the FBs.

[Jazzeraint]

FB population is tied to regions (specifically underground regions.)  So decreasing the number of layers (and therefore regions) decreases the FBs.

Awesome, thanks!

[PatrikLundell]

1. Is there some kind of formula for the number of FBs in a world of a given size?
2. Are the FBs generated placed in a pool and then randomly plunked down in a cavern, or are they tied to a particular cavern? My current embark would indicate the former (1/5/5 in a pocket world with 3 caverns).

[NullForceOmega]

If I am recalling correctly, and I think I am, each region in the caverns generates its own FB, but due to the caverns being interconnected the FBs can travel to reach your fort through them.

[PatrikLundell]

A further set of questions then:
1. What is an underground region? There are three caverns with their own basic biome, but there are biome variations, such as muddied caverns with and without trees, and I believe you also have with and without water. However, biome and region probably aren't the same thing, as you'd then usually end up with the same number of FBs is a huge world as in a pocket one.
2. Caverns are sometimes connected, and I assume a connection between two caverns anywhere in the world is sufficient for an FB to move between its originating cavern and the one at which it appears in your fortress. (Although using that logic they should also appear above ground, since there are caves reaching down to the caverns, but that might be to stretch the logic a bit too far. After all, spores aren't released until you find a cavern even though there has been a cave there all along (that releases cavern critters onto the surface)).

[NullForceOmega]

1.)  Regions are the same as biomes, all they really do is delineate one cave system from another (though due to how worldgen works they usually are connected anyway), there is variation within them as you noted above, but due to the lack of overall variation in cavern plants and animals, they pretty much just end up the same, except for the muddied caverns.

2.)  Okay, so how this works is that cavern layers are treated as separate regions even when interconnected, it is actually possible for a world to generate without enough connections for some FBs to reach you through them, and there used to be reports (though they may have been inaccurate) of FBs mysteriously arriving on the surface.  So you could have region 1 link to region 3 on the third layer, that then links to region 8 on the second layer and so on.

If that isn't clear enough please specify what you need clarified, and I'll try to answer (or give you a definite 'I don't know.')

[PatrikLundell]

What I really was after was some kind of numbers, but I can live without them.

When it comes to FBs showing up on the surface, it's happened to me, although that wasn't mysterious, as there was a cave down to the first cavern, and I'd discovered the FB while it was in the cavern, so it didn't arrive on the surface. If you had a cave and hadn't yet mapped the appropriate part of the cavern, I guess you could detect the FB as it reached the surface (but it should still be in the cave, just near the surface).