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[guitarxe]

I'm having trouble finding embark spots with iron (and flux) when I create worlds using the default pre-sets.
What settings do I have to change in advanced parameters to coax more iron deposits?

[Thorn]

As far I know, you can't increase amount of a specific metal in worldgen.
But you still can decrease minerals scarcity in general

[guitarxe]

I set that to 1000. I've read somewhere that that is the border at which one flux stone stops appearing, because off too much minerals. So in other words, that's as much mineral frequency as I can get without limiting flux stone.

I know I can't do it directly, but I mean, iron is supposed to appear in sedimentary layers, right? And these are formed by river erosion?

[Mrhappyface]

You could tweak the upper layer numbers to be higher.

[weenog]

Try turning down volcanism.  Sure, easy magma seems important for Imaginary Fort Steelgasm, but igneous layers and sedimentary layers don't get along so well.

[chris_strain]

I tend to run long, 600 or so, erosion cycles. Searching for sites with high drainage and flux leads me to iron a pretty good percent of the time. I haven't really scienced it so the erosion count thing could just be superstition on my part but it seems to work. If you are really desperate you could add environment tags to one or more of the iron ores, letting them appear in more layer types or in specific stone types.

[Nameless Archon]

I set that to 1000. I've read somewhere that that is the border at which one flux stone stops appearing, because off too much minerals.

No. Such. Thing. I get flux at 100 all the time.

[guitarxe]

Hm, if I search high drainage and flux stone, I usually get no sites that match. One world I got only 3 spots that had that =/

And also, what do you mean by environment tags?

[iofhua]

In advanced parameters, find "LEVELS_ABOVE_LAYER_1" and try increasing that number. That number determines the minimum number of stone layers between the surface and the first cavern layer. This might give you more layers to search for iron and other metals.

Nevermind. I forgot Iron is found in sedimentary layers only. Completely ignore what I just said.

[Thorn]

And also, what do you mean by environment tags?

In raw/objects/inorganic_stone_mineral.txt you look for iron ore mineral, for example Hematite:

Code: [Select]

[INORGANIC:HEMATITE]
[USE_MATERIAL_TEMPLATE:STONE_TEMPLATE]
[STATE_NAME_ADJ:ALL_SOLID:hematite][DISPLAY_COLOR:4:7:0][TILE:139]
[ENVIRONMENT:SEDIMENTARY:VEIN:100]
[ENVIRONMENT:IGNEOUS_EXTRUSIVE:VEIN:100]
[ITEM_SYMBOL:'*']
[METAL_ORE:IRON:100]
[SOLID_DENSITY:5260]
[MATERIAL_VALUE:8]
[IS_STONE]
[MELTING_POINT:12736]
There are lines such:

Code: [Select]

[ENVIRONMENT:SEDIMENTARY:VEIN:100]
You can add more tags making this ore more frequent. For example:

Code: [Select]

[ENVIRONMENT:METAMORPHIC:VEIN:100]so, you would find this ore in metamorphic layer.

Possibilities you can add:

Code: [Select]

ALL_STONE, IGNEOUS_ALL, SOIL, SOIL_OCEAN, SOIL_SAND, METAMORPHIC, SEDIMENTARY, IGNEOUS_INTRUSIVE, IGNEOUS_EXTRUSIVE, or ALLUVIAL.
Also, there's wiki page about modding that:
http://dwarffortresswiki.org/index.php/DF2012:Inorganic_material_definition_token

Good luck!

[guitarxe]

So, if I want iron to appear in a certain kind of stone, I add

Code: [Select]

[ENVIRONMENT:DOLOMITE:VEIN:100]
Is that correct?

[Thorn]

So, if I want iron to appear in a certain kind of stone, I add

Code: [Select]

[ENVIRONMENT:DOLOMITE:VEIN:100]
Is that correct?

Unfortunately no not. The format is:

Code: [Select]

[ENVIRONMENT:<class>:<inclusion type>:<frequency>]
You can only specify layers in <class>, like

ALL_STONE, IGNEOUS_ALL, SOIL, SOIL_OCEAN, SOIL_SAND, METAMORPHIC, SEDIMENTARY, IGNEOUS_INTRUSIVE, IGNEOUS_EXTRUSIVE, or ALLUVIAL

no individual kind of stone.

edit: btw remember, you still need to do a new worldgen though

[guitarxe]

I see, thanks.

[Sheb]

What about diamond which is (IIRC) only found in Kimberlite?

[Thorn]

Very good point! Same procedure as for iron, but you look in inorganic_stone_gem.txt

And tag is different:

Code: [Select]

[ENVIRONMENT_SPEC:stone:type:freq]where stone is specific stone id.
Example:

Code: [Select]

[ENVIRONMENT_SPEC:DOLOMITE:CLUSTER_SMALL:100]
[ENVIRONMENT_SPEC:KIMBERLITE:CLUSTER_SMALL:100]etc.

but I'm not 100% sure is that tag still working for metal ore's, I think it should.