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IDProjectCategoryView StatusDate SubmittedLast Update
0009476Dwarf FortressWeatherpublic2016-01-15 04:392016-10-03 18:17
Assigned ToLoci 
PlatformLinuxOSUbuntuOS Version14.04
Product Version0.42.04 
Target VersionFixed in Version 
Summary0009476: Evil weather in non-evil part of the map.
DescriptionTiny fraction of my embark is haunted. There happen rotten filth rains in that fraction of the map.
However, after I've started building tower and it got somewhere near the top of the trees, I've noticed the same filth being deposited on the tower roof.
Levels below the tower are not affected.
Additional InformationSavefile [^]
(Filth traces on palisade are caused by filthy dwarves getting washed by rain)
TagsNo tags attached.
Attached Files

- Relationships
duplicate of 0008781confirmedLoci Multiple biomes in air above surface; leads to odd weather like raining blood above "good" biome. 

-  Notes
Di (reporter)
2016-01-15 04:42

Hm, if you look at trees, some of their top tiles are covered in filth as well.
Walkabout (reporter)
2016-01-15 09:28

(I created a ticket for this exact issue and noticed this had just been created as well. Here is my post information from my own ticket, as well as a save.)

So, this should be a bug, but it's possible it's not. Seems to me to be unintended behavior though, and either way doesn't make a lot of sense. This save uses the Ironhand tileset, and has no mods except to remove the [ADOPTS_OWNER] tag from cats.

Save here: [^] [^]

Biomes in the air in a location can be different than the biomes on the ground, it would appear causing bizarre weather behavior. In this attached save you can see this by looking at the surface level of the map. You can see that the fortress is on a good biome (map tile colors in Ironhand are the light blue for good biomes, plus sunberries are present, etc).

However, go only one level up from the surface. On level 2 and above, in stark contrast to the good biome on the surface, you will see that it has evil biome weather. It rains goblin blood on level 2 and up. This goblin blood rain falls over most of the map, but never touches the ground on level 1. Anything that has surface area on level 2 and up, such as tree branches or the wall tops that enclose the entrance to the fort, do however, get rained on; in this case by the aforementioned goblin blood. You can see that the tops of the walls are covered in it, and that the tree limbs in a lot of places have blood.

You can also experience a rainstorm starting up that tells you it is raining goblin blood and, while looking at surface level 1 of the map, nothing ever happens there during the rain. It is essentially not raining at that level. But, go up a level, and you see it raining on any of the surfaces, as stated already. Pretty creepy!
Killzemallgod (reporter)
2016-01-15 16:33

This could be caused by evil oceans, had evil rain in a none evil map because the ocean in the world was evil. Had that happen in 40.24.

I would also suggest to have a look at the world itself like evil oceans.
DeKaFu (reporter)
2016-01-15 19:00

Just going to point out this is probably related to 0008781 and 0008724, which are both about evil rain happening in inappropriate biomes. Might possibly in turn be related to my issue 0009344 which is about swarms of contagious, murk-covered bird thralls showing up uninvited on a non-evil embark (but no evil weather announcements).
Di (reporter)
2016-01-18 03:51

Nah. Evil oceans on their own are not something happening in my save, there isn't any.
There's no easy way to check rainshadows, is there?

- Issue History
Date Modified Username Field Change
2016-01-15 04:39 Di New Issue
2016-01-15 04:42 Di Note Added: 0034432
2016-01-15 09:28 Walkabout Note Added: 0034434
2016-01-15 15:05 Dwarfu Relationship added has duplicate 0009477
2016-01-15 16:33 Killzemallgod Note Added: 0034436
2016-01-15 19:00 DeKaFu Note Added: 0034438
2016-01-18 03:51 Di Note Added: 0034456
2016-10-03 18:16 Loci Relationship deleted has duplicate 0009477
2016-10-03 18:17 Loci Relationship added duplicate of 0008781
2016-10-03 18:17 Loci Status new => resolved
2016-10-03 18:17 Loci Resolution open => duplicate
2016-10-03 18:17 Loci Assigned To => Loci

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