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[Ilmoran]

I was thinking about all the overly large scale projects that people do, namely damming rivers and flooding the mountainside with magma.

Eventually, I think it would be awesome if this created a persistent change to the region outside of your fortress site.  For performance, it would probably be easiest to do the recalculation when a fortress is abandoned, but I think it would be more interesting if the changes were calculated seasonally or annually so that, even if you don't see it happen, the landscape changes as you play.

Damming the river should remove its tiles downstream, and depending on the presence of aquifers, possibly even change biomes downriver.  Rerouting the water off a different edge of the map could cause the river to be generated again in a different direction.

Pouring magma onto the hillside and watching it flow off the map should scar the landscape around your site, and eventually create a new obsidian layer with no plants growing.

[Draco18s]

Pouring magma onto the hillside and watching it flow off the map should scar the landscape around your site, and eventually create a new obsidian layer with no plants growing.

(Solidified) magma is actually extremely nutrient rich.  It takes a few years for the plants to show up and break the obsidian (and other igneous rock types left behind) into arable land.

You ever seen pictures of Hawaii?



Its a volcanic island made of obsidian.

[sweitx]

Pouring magma onto the hillside and watching it flow off the map should scar the landscape around your site, and eventually create a new obsidian layer with no plants growing.

(Solidified) magma is actually extremely nutrient rich.  It takes a few years for the plants to show up and break the obsidian (and other igneous rock types left behind) into arable land.

You ever seen pictures of Hawaii?



Its a volcanic island made of obsidian.

Not just the obsidian (which is silica), but also volcanic eruption also bring up "valuable" potassium and other chemicals (valuable for plants).

[Draco18s]

Not just the obsidian (which is silica), but also volcanic eruption also bring up "valuable" potassium and other chemicals (valuable for plants).

I was trying to find a reference on why lava flows made for good soil, but couldn't.

[Ilmoran]

Pouring magma onto the hillside and watching it flow off the map should scar the landscape around your site, and eventually create a new obsidian layer with no plants growing.

(Solidified) magma is actually extremely nutrient rich.  It takes a few years for the plants to show up and break the obsidian (and other igneous rock types left behind) into arable land.

You ever seen pictures of Hawaii?



Its a volcanic island made of obsidian.

Right, but I was refering to a newly cooled obsidian layer.  Certainly if you wait a few years it should start getting plants in it again.

[Safe-Keeper]

(Solidified) magma is actually extremely nutrient rich.

...oh, damn, you remembered to add "Solidified". I had a whole slew of possible jokes to post .

You ever seen pictures of Hawaii?

Its a volcanic island made of obsidian.

Gasp! Can we start fortresses there?!

[Silverionmox]

Putting the prime farmland near active volcanoes is also a damn fine balance trick.

[Draco18s]

Putting the prime farmland near active volcanoes is also a damn fine balance trick.

Gives whole new meaning to "a (crashing and) burning economy"