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IDProjectCategoryView StatusDate SubmittedLast Update
0006387Dwarf FortressWorld Generation -- Constructionspublic2013-11-01 08:332017-10-29 11:31
Reportersmjjames 
Assigned ToLoci 
PrioritynormalSeverityminorReproducibilitysometimes
StatusresolvedResolutionno change required 
PlatformWin 7OSOS Version
Product Version0.34.11 
Target VersionFixed in Version 
Summary0006387: Cavern regions with high water content interfering with demon fort placement? Also no cavemoss or fungi on cavern 3
DescriptionI have no way of testing how many demon forts there are in a given region, but since I had little trouble finding demon forts in other regions and in this huge region the save is in I've explored for hours in this area which seems to have something like 70% water coverage, I've only seen one demon fort. While in an area of comparable size, I found four at least.

The other cavern features (except for maybe the trans-cavern passages and deep pits, but haven't been paying attention to those two specific features) appear in what seems like normal quantities.

This region is also notable for not having cave moss or floor fungi, but that is trivial since the upper two have that and it'd be easy to re-seed the cavern with the spores.
Steps To ReproduceThis is the worldgen I used, although the history might come out a bit differently.

Outside of using this worldgen:

1. Generate a world with potential for caverns with high water coverage (the settings below should do the trick.

2. Start up some adventurer, descend into the depths (though it may help to use DFhacks reveal to see what the cavern looks like below before descending).

3. Explore the region that has high water content.

4. Count how many demon forts you find and compare to a less watery cavern region.

[WORLD_GEN]
    [TITLE:MEDIUM REGION]
    [SEED:fTMmm2yGFe4vup3wwEzd]
    [HISTORY_SEED:ttpmQkzmlMrJOogh5H5A]
    [NAME_SEED:m2XuvBVI9S8S1soelFt3]
    [CREATURE_SEED:TBZvLXH2V840eyd0UJsT]
    [DIM:129:129]
    [EMBARK_POINTS:1324]
    [END_YEAR:250]
    [BEAST_END_YEAR:200:80]
    [REVEAL_ALL_HISTORY:1]
    [CULL_HISTORICAL_FIGURES:0]
    [ELEVATION:100:360:0:0]
    [RAINFALL:0:100:200:200]
    [TEMPERATURE:50:70:200:200]
    [DRAINAGE:0:100:200:200]
    [VOLCANISM:0:100:3200:3200]
    [SAVAGERY:0:100:400:400]
    [ELEVATION_FREQUENCY:4:100:0:0:0:1]
    [RAIN_FREQUENCY:1:1:1:1:1:1]
    [DRAINAGE_FREQUENCY:1:1:1:1:1:1]
    [TEMPERATURE_FREQUENCY:1:0:1:1:1:0]
    [SAVAGERY_FREQUENCY:1:10:1:1:1:1]
    [VOLCANISM_FREQUENCY:5:10000:0:0:0:1]
    [MINERAL_SCARCITY:300]
    [MEGABEAST_CAP:18]
    [SEMIMEGABEAST_CAP:37]
    [TITAN_NUMBER:10]
    [TITAN_ATTACK_TRIGGER:120:0:200000]
    [DEMON_NUMBER:28]
    [NIGHT_TROLL_NUMBER:28]
    [BOGEYMAN_NUMBER:0]
    [VAMPIRE_NUMBER:28]
    [WEREBEAST_NUMBER:28]
    [SECRET_NUMBER:24]
    [REGIONAL_INTERACTION_NUMBER:58]
    [DISTURBANCE_INTERACTION_NUMBER:58]
    [EVIL_CLOUD_NUMBER:58]
    [EVIL_RAIN_NUMBER:58]
    [GOOD_SQ_COUNTS:25:251:503]
    [EVIL_SQ_COUNTS:0:0:0]
    [PEAK_NUMBER_MIN:0]
    [PARTIAL_OCEAN_EDGE_MIN:0]
    [COMPLETE_OCEAN_EDGE_MIN:0]
    [VOLCANO_MIN:200]
    [REGION_COUNTS:SWAMP:0:0:0]
    [REGION_COUNTS:DESERT:0:8:0]
    [REGION_COUNTS:FOREST:0:3:0]
    [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:0:0]
    [PERIODICALLY_ERODE_EXTREMES:1]
    [OROGRAPHIC_PRECIPITATION:1]
    [SUBREGION_MAX:2750]
    [CAVERN_LAYER_COUNT:3]
    [CAVERN_LAYER_OPENNESS_MIN:50]
    [CAVERN_LAYER_OPENNESS_MAX:100]
    [CAVERN_LAYER_PASSAGE_DENSITY_MIN:0]
    [CAVERN_LAYER_PASSAGE_DENSITY_MAX:0]
    [CAVERN_LAYER_WATER_MIN:30]
    [CAVERN_LAYER_WATER_MAX:100]
    [HAVE_BOTTOM_LAYER_1:1]
    [HAVE_BOTTOM_LAYER_2:1]
    [LEVELS_ABOVE_GROUND:50]
    [LEVELS_ABOVE_LAYER_1:20]
    [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:0]
    [NON_MOUNTAIN_CAVE_MIN:75]
    [ALL_CAVES_VISIBLE:0]
    [SHOW_EMBARK_TUNNEL:2]
    [TOTAL_CIV_NUMBER:20]
    [TOTAL_CIV_POPULATION:15000]
    [SITE_CAP:1040]
    [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]
Additional Informationhttp://dffd.wimbli.com/file.php?id=8103 [^]
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Issue History
Date ModifiedUsernameFieldChange
2013-11-01 08:33smjjamesNew Issue
2013-11-03 08:16smjjamesNote Added: 0024193
2013-11-03 08:19smjjamesNote Edited: 0024193bug_revision_view_page.php?bugnote_id=0024193#r9023
2013-11-03 08:21smjjamesNote Edited: 0024193bug_revision_view_page.php?bugnote_id=0024193#r9024
2013-11-03 12:08smjjamesNote Edited: 0024193bug_revision_view_page.php?bugnote_id=0024193#r9025
2013-11-03 12:13smjjamesNote Edited: 0024193bug_revision_view_page.php?bugnote_id=0024193#r9026
2017-10-29 11:31LociNote Added: 0036813
2017-10-29 11:31LociStatusnew => resolved
2017-10-29 11:31LociResolutionopen => no change required
2017-10-29 11:31LociAssigned To => Loci

Notes
(0024193)
smjjames   
2013-11-03 08:16   
(edited on: 2013-11-03 12:13)
One thing that I've noticed is that regions with these odd third cavern layers seem to have no problem producing wildlife while other regions are just devoid of wildlife, or it's so sparse that I never manage to encounter any. Ramp issues are also common in these regions apparently. There also seems to be a bit of a problem connecting westward in the area where I am, but eh, cavern is a maze anyway.

Testing out another world with the same worldgen settings and different seed.

I did find one, though it doesn't seem like forts are able to generate very well where there is lots of water.

Toady One did some changes (complete overhaul?) to demon sites, so the question on the fortress generation is probably moot. The no moss or floor fungi could be looked at though.
(0036813)
Loci   
2017-10-29 11:31   
Demonic fortresses were removed in v0.40.01, but according to the wiki prior versions would generate one fortress per 16x16 embark square, which is fairly rare.

Caverns occasionally generate with a Subterranean Chasm biome, which only supports very limited flora (bloodthorns, specifically). This behavior is likely intentional.