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[StephanReiken]

Is it just me or does DF no longer generate nearly as much Flux Stone as it used to? I've made several large worlds in a row (which on my slow computer takes hours) that ended up with 0 Flux stone.

I finally got one that did have Flux stone though.

Am I just unlucky?

[CodexDraco]

I have never have a world without flux. Are you using advanced world gen? Try decreasing volcanism.

[StephanReiken]

Standard World Gen which pumps out these options produced no Flux on the map. Using Phoebus Graphics pack without any other modifications.

Spoiler (click to show/hide)

[WORLD_GEN]
   [TITLE:CREATE WORLD NOW = 4445535]
   [SEED:lrQyXMSc8CTbnLb7zKjI]
   [HISTORY_SEED:VWWRGWZi0tHoBYDo3Pbk]
   [NAME_SEED:PdMltI7hzYnUK97x9TL6]
   [CREATURE_SEED:Ulc8ywcOIYOlGnGCaT7g]
   [DIM:129:129]
   [EMBARK_POINTS:1324]
   [END_YEAR:550]
   [BEAST_END_YEAR:550:-1]
   [REVEAL_ALL_HISTORY:1]
   [CULL_HISTORICAL_FIGURES:0]
   [ELEVATION:1:400:1600:1600]
   [RAINFALL:0:100:200:200]
   [TEMPERATURE:25:75:200:200]
   [DRAINAGE:0:100:200:200]
   [VOLCANISM:0:100:200:200]
   [SAVAGERY:0:100:200:200]
   [ELEVATION_FREQUENCY:4:2:0:1:0:1]
   [RAIN_FREQUENCY:1:1:1:1:1:1]
   [DRAINAGE_FREQUENCY:1:1:1:1:1:1]
   [TEMPERATURE_FREQUENCY:1:1:1:1:1:1]
   [SAVAGERY_FREQUENCY:1:1:1:1:1:1]
   [VOLCANISM_FREQUENCY:1:1:1:1:1:1]
   [MINERAL_SCARCITY:100]
   [MEGABEAST_CAP:36]
   [SEMIMEGABEAST_CAP:74]
   [TITAN_NUMBER:18]
   [TITAN_ATTACK_TRIGGER:80:0:100000]
   [DEMON_NUMBER:28]
   [NIGHT_TROLL_NUMBER:14]
   [BOGEYMAN_NUMBER:14]
   [VAMPIRE_NUMBER:14]
   [WEREBEAST_NUMBER:14]
   [SECRET_NUMBER:28]
   [REGIONAL_INTERACTION_NUMBER:28]
   [DISTURBANCE_INTERACTION_NUMBER:28]
   [EVIL_CLOUD_NUMBER:14]
   [EVIL_RAIN_NUMBER:14]
   [GOOD_SQ_COUNTS:6:63:0]
   [EVIL_SQ_COUNTS:6:63:0]
   [PEAK_NUMBER_MIN:3]
   [PARTIAL_OCEAN_EDGE_MIN:0]
   [COMPLETE_OCEAN_EDGE_MIN:4]
   [VOLCANO_MIN:1]
   [REGION_COUNTS:SWAMP:66:0:0]
   [REGION_COUNTS:DESERT:66:0:0]
   [REGION_COUNTS:FOREST:264:0:0]
   [REGION_COUNTS:MOUNTAINS:528:0:0]
   [REGION_COUNTS:OCEAN:528:0:0]
   [REGION_COUNTS:GLACIER:16:0:0]
   [REGION_COUNTS:TUNDRA:33:0:0]
   [REGION_COUNTS:GRASSLAND:528:0:0]
   [REGION_COUNTS:HILLS:528:0:0]
   [EROSION_CYCLE_COUNT:250]
   [RIVER_MINS:25:25]
   [PERIODICALLY_ERODE_EXTREMES:1]
   [OROGRAPHIC_PRECIPITATION:1]
   [SUBREGION_MAX:2750]
   [CAVERN_LAYER_COUNT:3]
   [CAVERN_LAYER_OPENNESS_MIN:0]
   [CAVERN_LAYER_OPENNESS_MAX:100]
   [CAVERN_LAYER_PASSAGE_DENSITY_MIN:0]
   [CAVERN_LAYER_PASSAGE_DENSITY_MAX:100]
   [CAVERN_LAYER_WATER_MIN:0]
   [CAVERN_LAYER_WATER_MAX:100]
   [HAVE_BOTTOM_LAYER_1:1]
   [HAVE_BOTTOM_LAYER_2:1]
   [LEVELS_ABOVE_GROUND:15]
   [LEVELS_ABOVE_LAYER_1:5]
   [LEVELS_ABOVE_LAYER_2:1]
   [LEVELS_ABOVE_LAYER_3:1]
   [LEVELS_ABOVE_LAYER_4:1]
   [LEVELS_ABOVE_LAYER_5:2]
   [LEVELS_AT_BOTTOM:1]
   [CAVE_MIN_SIZE:5]
   [CAVE_MAX_SIZE:25]
   [MOUNTAIN_CAVE_MIN:20]
   [NON_MOUNTAIN_CAVE_MIN:30]
   [ALL_CAVES_VISIBLE:0]
   [SHOW_EMBARK_TUNNEL:2]
   [TOTAL_CIV_NUMBER:80]
   [TOTAL_CIV_POPULATION:15000]
   [SITE_CAP:2000]
   [PLAYABLE_CIVILIZATION_REQUIRED:1]
   [ELEVATION_RANGES:8000:1056:528]
   [RAIN_RANGES:528:1056:528]
   [DRAINAGE_RANGES:528:1056:528]
   [SAVAGERY_RANGES:528:1056:528]
   [VOLCANISM_RANGES:528:1056:528]

[Broseph Stalin]

I can't tell you how many times I've found flux on a map with no flux it's possible that the site checker is lying to you but at the same time getting more flux is easy if you raise mineral scarcity.

[Loud Whispers]

[MINERAL_SCARCITY:100]

Your problem is there. There are links between higher mineral counts severely reducing flux on world gen. As it stands, you're genning your worlds with mountainous amounts of minerals. Raise the number higher.

[vjek]

Because I love quoting myself...

Regarding flux..  I decided to do a little testing, used a worldgen I made in the past day or so, and generated 10 worlds with it.

Testing parameters (using vanilla 34.07):

Worldgen

Spoiler (click to show/hide)

[WORLD_GEN]
   [TITLE:FLUX_TEST1]
   [DIM:65:65]
   [EMBARK_POINTS:2500]
   [END_YEAR:250]
   [BEAST_END_YEAR:250:99]
   [REVEAL_ALL_HISTORY:0]
   [CULL_HISTORICAL_FIGURES:1]
   [ELEVATION:100:400:101:101]
   [RAINFALL:10:32:101:101]
   [TEMPERATURE:90:90:0:0]
   [DRAINAGE:10:49:101:101]
   [VOLCANISM:0:0:0:0]
   [SAVAGERY:0:0:0:0]
   [ELEVATION_FREQUENCY:3:8:0:0:0:2]
   [RAIN_FREQUENCY:1:1:1:1:1:1]
   [DRAINAGE_FREQUENCY:1:1:1:1:1:1]
   [TEMPERATURE_FREQUENCY:1:1:1:1:1:1]
   [SAVAGERY_FREQUENCY:1:1:1:1:1:1]
   [VOLCANISM_FREQUENCY:1:1:1:1:1:1]
   [MINERAL_SCARCITY:500]
   [MEGABEAST_CAP:0]
   [SEMIMEGABEAST_CAP:0]
   [TITAN_NUMBER:0]
   [TITAN_ATTACK_TRIGGER:80:0:0]
   [DEMON_NUMBER:0]
   [NIGHT_TROLL_NUMBER:0]
   [BOGEYMAN_NUMBER:0]
   [VAMPIRE_NUMBER:0]
   [WEREBEAST_NUMBER:0]
   [SECRET_NUMBER:0]
   [REGIONAL_INTERACTION_NUMBER:0]
   [DISTURBANCE_INTERACTION_NUMBER:0]
   [EVIL_CLOUD_NUMBER:0]
   [EVIL_RAIN_NUMBER:0]
   [GOOD_SQ_COUNTS:0:0:0]
   [EVIL_SQ_COUNTS:0:0:0]
   [PEAK_NUMBER_MIN:0]
   [PARTIAL_OCEAN_EDGE_MIN:0]
   [COMPLETE_OCEAN_EDGE_MIN:0]
   [VOLCANO_MIN:0]
   [REGION_COUNTS:SWAMP:0:0:0]
   [REGION_COUNTS:DESERT:0:0:0]
   [REGION_COUNTS:FOREST:0:0:0]
   [REGION_COUNTS:MOUNTAINS:0:0:0]
   [REGION_COUNTS:OCEAN:0:0:0]
   [REGION_COUNTS:GLACIER:0:0:0]
   [REGION_COUNTS:TUNDRA:0:0:0]
   [REGION_COUNTS:GRASSLAND:0:0:0]
   [REGION_COUNTS:HILLS:0:0:0]
   [EROSION_CYCLE_COUNT:1000]
   [RIVER_MINS:800:800]
   [PERIODICALLY_ERODE_EXTREMES:0]
   [OROGRAPHIC_PRECIPITATION:0]
   [SUBREGION_MAX:2750]
   [CAVERN_LAYER_COUNT:1]
   [CAVERN_LAYER_OPENNESS_MIN:10]
   [CAVERN_LAYER_OPENNESS_MAX:15]
   [CAVERN_LAYER_PASSAGE_DENSITY_MIN:0]
   [CAVERN_LAYER_PASSAGE_DENSITY_MAX:0]
   [CAVERN_LAYER_WATER_MIN:10]
   [CAVERN_LAYER_WATER_MAX:15]
   [HAVE_BOTTOM_LAYER_1:1]
   [HAVE_BOTTOM_LAYER_2:1]
   [LEVELS_ABOVE_GROUND:1]
   [LEVELS_ABOVE_LAYER_1:40]
   [LEVELS_ABOVE_LAYER_2:16]
   [LEVELS_ABOVE_LAYER_3:2]
   [LEVELS_ABOVE_LAYER_4:2]
   [LEVELS_ABOVE_LAYER_5:3]
   [LEVELS_AT_BOTTOM:2]
   [CAVE_MIN_SIZE:1]
   [CAVE_MAX_SIZE:1]
   [MOUNTAIN_CAVE_MIN:0]
   [NON_MOUNTAIN_CAVE_MIN:0]
   [ALL_CAVES_VISIBLE:1]
   [SHOW_EMBARK_TUNNEL:2]
   [TOTAL_CIV_NUMBER:2]
   [TOTAL_CIV_POPULATION:5000]
   [SITE_CAP:10]
   [PLAYABLE_CIVILIZATION_REQUIRED:1]
   [ELEVATION_RANGES:0:0:0]
   [RAIN_RANGES:0:0:0]
   [DRAINAGE_RANGES:0:0:0]
   [SAVAGERY_RANGES:0:0:0]
   [VOLCANISM_RANGES:0:0:0]

note Mineral Scarcity: 500.  One cavern.  No volcanism, no volcanos.  Mountains and plains only.  Plains were all elevation 100.  All embarks were found on the plains.

Finder Parameters
Embark Dimensions - 4x4
Flux Stone - Yes
Aquifer - No
Shallow Metal - Multiple
Deep Metal - Multiple

Flux is: Calcite, Chalk, Dolomite, Limestone, Marble
10 random worlds with above worldgen, vanilla 34.07, results are..

Marble Y/N      First Stone under soil level(s)
----------      -------------------------------
     Y                 Dolomite
     Y                 Limestone
     Y                 Shale
     Y                 Siltstone
     Y                 Phyllite
     Y                 Claystone
     Y                 Chert
     Y                 Shale
     Y                 Siltstone
     Y                 Siltstone
     Y                 Marble
     
Every single map met the finder criteria, and every single time, finder was correct.  Verified with dfhack 'prospect hell' and 'reveal'.  Every embark had Marble, at minimum.
However, it sometimes did this by combining two biomes to get all the parameters to match.
Biome1 could have Shallow metals
Biome2 could have Deep Metals, and Flux
So when you view it, initially, you think, no flux! But if you press F2, you see flux, and if you embark, flux is there.
Even if it's just Marble, 100% (10/10) of all worlds made with that worldgen, there was flux, and the finder worked exactly as expected.

I'll be happy to do another round of tests if someone has some constructive criticism/suggestions to debunk some of the myths.

I'll be happy to do another round of tests if someone has some constructive criticism/suggestions to debunk some of the myths.

If it's not too much trouble, could you do it in a world with higher volcanism?

Here's the results.  All I changed was Volcanism Minimum: 100 & Volcanism Maximum: 100

Generated 10 random worlds as before, same worldgen except those two parameters changed. (vanilla 34.07)

#      Marble     First Stone
--     ------     -----------
01      Yes        Obsidian
02      Yes        Dacite
03      Yes        Obsidian
04      Yes        Basalt
05      Yes        Dacite
06      Yes        Andesite
07      Yes        Phyllite
08      Yes        Rhyolite
09      Yes        Andesite
10      Yes        Dacite

Finder Parameters
Embark Dimensions - 4x4
Flux Stone - Yes
Aquifer - No
Shallow Metal - Multiple
Deep Metal - Multiple

Every world found at least a dozen embarks (some had several hundred) that matched the finder parameters.  Every embark the finder found had marble. And again, the finder was never wrong, but on some locations, a multi-biome embark was necessary to match all the parameters.

Note:  500 mineral Scarcity. 100 min volcanism. 100 max volcanism. 10/10 worlds found flux (marble) with the embark finder.

I've never seen any similar flux !!Science!! done below 500 mineral scarcity.  It would have to be a seriously wacky formula to go from 100% flux at 500 scarcity to 0% flux at 100 scarcity, with 100 min/max volcanism.

[MiniMacker]

If you're using the standard worldgen, if you set the Mineral Density to Everywhere, there will be little to no flux stone.

[Replica]

Strange, I've genned worlds using 100 mineral scarcity that had plenty of flux.
Pretty sure I built an above ground palace all out of marble in one of them.

Must have been a bad gen, they happen you know.

[Uggh]

I can't tell you how many times I've found flux on a map with no flux it's possible that the site checker is lying to you [...]

I observed the same.
In my current embark (completely standard settings with Phoebus Graphics pack only), the site checker reported flux for a 3x3 area. After increasing the area to 5x5, the flux message disappeared although the original 3x3 was still included. Does the site checker only report flux if a certain percentage of the embark area comprises it?

Meanwhile I found marble as expected...

[Broseph Stalin]

Strange, I've genned worlds using 100 mineral scarcity that had plenty of flux.
Pretty sure I built an above ground palace all out of marble in one of them.

Must have been a bad gen, they happen you know.

Was it in layers or veins and clusters?

[L3TUC3]

When I set the mineral setting to 'everywhere' (I don't want to dig around too long for anything) during gen my finder will claim no flux anywhere. But there's always been loads marble when you dig around enough, even had whole layers of chalk near the surface a failed fort or two ago. I don't use the finder to look for flux anymore as there's always been plenty. Don't know why the finder doesn't work.

[MadocComadrin]

The finder does work; however, sometimes the map won't list flux on your screen when you're browsing the results.

[vidboi]

Strange, I've genned worlds using 100 mineral scarcity that had plenty of flux.
Pretty sure I built an above ground palace all out of marble in one of them.

Must have been a bad gen, they happen you know.

Was it in layers or veins and clusters?

It should be in layers. I've had plenty of low mineral density (even 100) worlds with many flux layers. Minerals are placed after layer stones anyway so changing the scarcity value has no effect on the placement of layer stones.

[vjek]

When I set the mineral setting to 'everywhere' (I don't want to dig around too long for anything) during gen my finder will claim no flux anywhere. But there's always been loads marble when you dig around enough, even had whole layers of chalk near the surface a failed fort or two ago. I don't use the finder to look for flux anymore as there's always been plenty. Don't know why the finder doesn't work.

The finder does work; however, sometimes the map won't list flux on your screen when you're browsing the results.

As I mention above, the finder is always right in those 20 tests and every time I've ever used it before or since. 100% right 100% of the time.  However, multi-biome embarks require you to press F1, F2, F3, F4 to show alternate biomes for the embark area selected.  Only the first biome is shown, which may or may not contain the flux.  One of the others (press F2, F3, F4) will have it.

It is finding flux.  It is there.  You just have to press the key to show it.   

[Mr S]

Flux I have no problem with.  I've been satisfied with site finder on that one, as mentioned above.  What I have had issues with recently is getting any kind of iron ore.

0.34.10, Phoebus, Advanced gen, 1000-1250 scarcity, medium region.  DFHack.
Rolled up a dozen worlds, and after multiple embarks, only found two with any iron ores.  At that, the most was 451 tiles of hematite.  Dumb luck, I guess.

Rolled up a 0.34.11 last night. doesn't appear DFHack is up to .11 yet, so I'll see what I get!!