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[Torxciv]

So I've recently finished reading the epic of Captain Ironblood and it's given me a hankering to put down stakes around the south pole, however, I won't stand to see my dwarfs working a wood furnace and smelting coal, I just...I mean, they're already alcoholics, I can't stand by and watch them become coke-fiends, can I? After some fifteen fortresses, I can't break my magma-forge addiction. I either have to have a volcano or I make a mad dash for that wonderful ocean of fire the first change I get.

And so I put it to you: can I fiddle my world-gen to the point where I can have a volcano or vent on a glacier, or are there some basic properties of the universe that keep these sorts of things from happening? It's usually too much of a hassle to bring the magma sea up the average fifty z-levels to where I'm doing business and a real bit of luck if I have a space big enough for a pump stack that doesn't go through any caverns, so the nearer the surface the better. I'm not above using DFliquids because glaciers offer enough challenges, but I'd prefer to do it rather than magic my problem away. And pointers from you folks?

[Guedez]

Using DFReveal to find and dig the pipe without the caverns is magic? i do usualy, and well, you can try to force vulcanism to 100/100 and press P when the thingy complains about too much rejectons, your maps will be 30z height and there will be lava, lava everywhere

btw, if you intend to mess with the height, 200 -> above sea, 300+ -> mountains(you need if you want dorfs) so a 290-302 world without erosion is a nice flat place, except on the vulcanoes(vulcanism ftw)

i never managed to find limestone on a world like that tough, once you put stuff you like, you lose stuff you like even more

[zephyr_hound]

I have a custom worldgen that makes very cold worlds with lots of glaciation and high vulcanism and I get glacier volcanoes all the time, WITH flux stone. They do tend to be irritatingly hilly areas of the glacier though. Can share params if you need them.

[utuki]

You can reduce height and number of caverns in worldgen and get magma sea as close to surface as you want

[Hans Lemurson]

There is nothing that would prevent a volcano from peeking through a glacier.  In fact, my most recent fort IS a volcano-fortress in a glacier.  I did this so that I could play around with melting and re-freezing ice.  Magma + glacier = unlimited water, since freeze/thaw cycles produce a net gain of water.

[Satarus]

What I do for good volcano spots is up the minimum volcanism to about 20 and then jack the variation to maxium.  That way you can get sedimentary layers near a volcano.  Next up the number of volcanoes to max.  You will then want to set minimum elevation to about 280 and the max elevation to 320.  That gives you the greater possibility of volcanoes away from the middle of mountain ranges.  Finally you will need to set many of the mimimum X tiles to zero like low elevation and number of oceans.  Make sure you log rejects so you know what other settings to fiddle with to get a world to gen.