Sorry folks, I have to say that if my dwarf is happily munching on a raw goat lung with a side of thyroid gland, there's really nothing against some abstracted 'filth' dwarves produce in a 1/7 puddle in the channel under a toilet.
EDIT: Added my full suggestion up here.
Just so its clear, I'd like 'filth' as an evaporating flow that leaves behind trackable, disgusting grime on the tile. Outside, filth is washed away by rain and dwarves will try to 'use a shrub' if no options are possible. Once you start digging deep, problems arise.
Dwarves who do their smelly business randomly through the fort because you have no sanitation system get unhappy thoughts. Grime gets on their clothes and into wounds, causing infections. Dwarves have to clean themselves as well as the floors of grime, which causes more unhappy thoughts. The solution is to build a latrine, a 1x1 tile room consisting of a chair, hatch cover and bucket, using the hatch cover tile. It is built over open space just like a well, only dwarves can stand on it. You designate it into a room, assigning an owner if you wish or leaving it public. Using a latrine room when more than one dwarf is present in the room causes an unhappy thought; don't forget the door!
Example latrine off a tower; note the gem window and masterful pine door!
When used, the 1/7 bit of filth falls down into whatever hole exists to either splatter at the base of a tower, off a cliff, into a stream, into a cistern, or into a flowing sewer tunnel. In any case, doing so causes a happy thought (a golden throne and platinum bucket causing even happier ones). The dwarf is filth and grime free and returns to his daily routine of vomiting and getting covered in antman ichor. If filth doesn't begin to pile up, it evaporates into grime which can be ignored. If it does pile up, however, it spreads to other tiles using magma physics; unpressured and slow. A busy fort might find itself filling smaller cisterns. A 4/7 tile of filth generates miasma, which can rise through the latrine or any other openings.
Dealing with the filth production of a large fort requires water or magma. Magma obviously burns filth into smoke and causes potentially hillarious results, since a stream of flammable liquid trails from the magma all the way to your dwarf's behind sitting on a latrine. Clever players can come up with a solution or ten to this possible source of fun; floodgates, for example. However water behaves with filth differently. When water comes in contact with filth, any amount of filth, it is turned into filthy water and the two liquids combine. Filthy water leaves behind grime rather than mud, making it unsuitable for farming and bathing, and contaminates wells and pools. Dwarves must cautiously direct the water off site, into rivers or caverns, and possibly have evaporated away in the boundless magma sea. However, filthy water does not generate miasma or burn. It does, however, create an inviting habitat for a variety of mutated crap. I mean carp. Also tentacled beasties and kobolds, naturally.
Some people are worried that huge sewer systems will be required for forts; they are not. They are only required for huge forts. Your founders will be quite content to use shrubs and the like during the early months and once a latrine can be set up in a corner with a decent cistern below, you really have nothing to worry about for several waves of migrants. Once enough migrants amass that your latrines begin to fill and generate miasma, either dump the latrines into rivers, flush them with pumped or bucketed water, or seal up the latrine and dig newer, bigger ones. Only when your sprawling megafortress begins generating a new tile of 7/7 filth every week do you need the sort of sewer system that so many players long to explore in adventurer mode or defend against ratmen invaders. Because there is a lot of build-up time before the major demand arrives, most people should be able to agree this is a way to add fun and challenge to the end game. Kings demanding private golden latrines and sewer monsters crawling out of the deep? Sieges forcing us to close off our sewer system and disease running rampant through the fort? Yes please.
And of course, filth could be disabled in the init raw, and by being handled as 'filth' rather than specifically urine and feces, we put a fig leaf on the matter for the squeamish.
And Here, Quoted Without Permission, Footkerchief's Toady Quotes Regarding Filth
Any, Toady already said he wasn't going to do it.
I don't know how this became the conventional wisdom, because (as far as I know) he's never made an unqualified statement that he wouldn't in any form implement feces, scat, waste, or night soil. The game already has a brown "filth" material that, according to Toady, is feces (see quotes below).
Here's all the quotes I could dig up (note that this first one is from 2004, and that "no plans" is very different from "won't do it"):
There are no plans to add "night soil". Dwarves poop little pebbles which seemlessly disappear into the cavern floor, or they collect them and cherish them or something.
Do dwarves have water closets? Will we need to carefully craft "flushing" mechanisms to carry the unmentionables away?
There is currently no potty.
4. Manure, as a fertilizer.
4. They just drop it everywhere? Everyone will might be doing it after a while... night soil, and so on. But it's a dangerous door to open, especially if the room on the other side is full. If a god turns you into a horse in adventure mode, would you suddenly start dropping the bomb?
From DF Talk:
Toady: [...] I like the idea of being able to track things and find them, and pick up little kobold scats and dig around to see what they've been eating ... after a fashion, anyway.
Rainseeker: So there's no poo creatures either?
Toady: It was a close thing! Because it was literally a decision I had to make, going down this list, because in the Hidden Fun Stuff of course if you get the tentacle demons then you get a layer scattered with various filth on the ground; and there's brown filth and yellow filth and so on and it's not clearly stated but it's a material that I had to put in properties for right? So there's these hard-coded filth materials, and when I was going down the list, you know 'Do I want creatures made out of mud? Do I want creatures made out of vomit? Do I want creatures made out of glass?', there's all these hard-coded materials, and I was just like 'Yeah, yeah, yeah ... No ... No ...' on the filth. But there are creatures made out of the grime, and the grime material is the material that collects on your body slowly over time, and it's also the material that's used in swamp water, so there's this ... I just needed this material called 'grime' for these miscellaneous purposes, it's just crap, just stuff that collects over time and when a creature is made out of that it just says 'composed of grime and filth'. So if you want to call that 'poo' even though it's not it's possible for you to extend your imagination.
Toady: [...] But the kind of thing that's on the table is gunpowder, and the materials that you need for that are already in the game, I think. We've got brimstone, which is sulphur, and I don't remember if we have saltpetre, if it's there or not, but ... I guess you could do all kinds of things with manure and urine to make it, or you can find it in a crystalline form in the ground perhaps.
And finally, sewers full of filth were a powergoal in the old dev item system:
# PowerGoal153, THE CRACKS OF DOOM, (Future): You flee into the sewer with the baron's ring, but sliding in the muck, you drop it. Try as you might, you cannot locate the precious object in the town's filth.
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Topic: Nothing Sacred Left: Add Sewage Already (Read 57985 times)