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[GuesssWho]

I'm trying to learn dfhack, and so far I've turned a lake into obsidian. Not sure how to turn it back. Any suggestions?

. . . at least I'm not flooded anymore.

[Orange Wizard]

The tiletypes interface should allow you to turn the obsidian into open space, then use the liquids function to spawn water back in.

[GuesssWho]

How do you get there from the main interface?

[Orange Wizard]

I can't actually remember the details. You should ask on the DFHack thread, or change the title of this to something more specific (e.g. DFHack tiletypes help).

[Max™]

If you have the terminal pulled up (were you doing liquids through a hotkey and the gui?) then just type tiletypes

Then once the terminal changes from dfhack> to tiletypes> type paint s air m empty and it should give you a square of open space where the cursor is when you hit enter.

If you don't mind it being 1 level deep you can use liquids and just hit of for obsidian floor and then range x y accordingly.

[GuesssWho]

Is there a way to turn the 'pool' of obsidian back into water?

[Max™]

Once you have it converted into floors 'liquids of range x y' you can 'liquids w' if it isn't multiple levels deep.

If it is then you can still convert the bottom to floors but you'll want 'tiletypes paint s empty m air range x y z'' first and then you can fill it with 'liquids w range x y z' because I don't think tiletypes can paint water... it can do ice but that's pretty damn buggy already, I can't imagine what would happen if you told the game there was a tile of solid water which wasn't ice somewhere.

Oh yeah, the tiletypes and liquids range values count right, down, and up from the cursor.

So you put 'tiletypes paint s empty m air range 7 7 7' it should give you 7 of these stacked upwards from the cursor at the 'X':
X 2 3 4 5 6 7
2
3
4
5
6
7

Then just put a floor back in (the 'tiletypes s empty m air' command removes the "floor" from the top of the "wall" below it as well as the material where the wall was) which is probably safer to do with 'liquids of range 7 7 1' than 'tiletypes paint s floor m lava_stone range 7 7 1' because you can just do 'w range 7 7 7' and fill it back up.

Change the values as you need, of course.

[GuesssWho]

. . . so how did I even manage to petrify the whole thing at once, then?

[Max™]

Easier to do than undo.

[GuesssWho]

Easier to do than undo.

Well that's annoying. There should be an obsidian-to-water function, if the other way around is so easy.

[orbcontrolled]

. . . so how did I even manage to petrify the whole thing at once, then?

That's actually a good question since tiletypes and liquids only really work in rectangles. Did you just spawn a huge amount of lava over the lake? Also, have you revealed the map? You may have affected a larger area than you intended and just can't see it all. (I like to use "reveal hell" because it keeps me from accidentally unpausing while I have the map in a cave-in-ish, dwarf-unfriendly, or otherwise delicate state (Remember to unreveal before you save, otherwise its a pain and a half to fix (you have to hide the whole map with tiletypes then use revflood)))

One thing that I can think of to help fix your lake is that you can set the range on tiletypes really high (like "r 100 100") then "filter mat lava_stone" so that tiletypes will only affect tiles made of obsidian (remember to set it back to "filter any" afterwards otherwise you'll wonder why tiletypes isn't doing anything all of a sudden).

Also, if you haven't already, you should open tiletypes and type "help", and read through it. At the end, it says "See help [option] for more information", which means that you should type things like "help Material" (or "help mat" or "help m") and "help Shape" in order to get a better idea of what is possible.

Also, if you plan to do this a lot, you will save a lot of aggravation by adding keybindings like "keybinding add Ctrl-Q tiletypes-here" and "keybinding add Ctrl-W tiletypes-here-point" to your dfhack.init file. Its miserable enough switching back and forth, no need to do more of it than necessary.

Personally I'm just dreaming of the day that the whole tiletypes/liquids/changelayer/changevein/sources/etc. dance grows into a full-blown map editor.

[GuesssWho]

I have no idea what happened, the entire lake just petrified all at once. I'm starting to think it shouldn't have been possible.