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[Vehudur]

I'm going to be working on a mini-megaproject.

I need the following conditions:

1.  The map must be completely flat.  Literally.  Even a 1z hill and this is no good.
2.  It must be a forest.
3.  There must be no aquifer.
4.  There must be a river 8 to 10 tiles wide.
5.  Very deep soil is required.
6.  It must be a cool climate, with sub-freezing temperatures between late autumn and early spring.
7.  No siltstone, because fuck siltstone.

Multiple attempts at generating a world with these conditions have failed.   What can I do to get this?   I've managed to get everything but the flat part.

[Urist Imiknorris]

Reduce the elevation variance in world gen. That might help with the flatness.

And mod out aquifers.

[Urist McBeard]

Why not just channel the map flat?

[Tiruin]

First, in the embark screen, press the 'tab' key for a bit to look at varying screens on the embark spot. For the flat land, look for those blue 0s. That is flat land.

Mostly, forests are troublesome as it is often raised land and a few depressions here and there. Aquifers are common in Broafleaf forests.

Rivers...hard to explain, the size of them mostly vary but in proportion to their distance from a major river/lake (Represented by two parellel ~ in the map, color is blue)

Cool climate? You need the freezing temperatures? Regen the world until you see light blue squares, and a forest near those. That is the cold region of the world.

I'm unsure as to how stone layers are generated, you may have random bits of stone depending on embark. You may just delete the entry of Siltstone in the raws to get rid of it.


Edit: 2 Ninjas

[NecroRebel]

1. Turning the erosion cycle count up really high in advanced world gen tends to create flatter worlds. Otherwise, make sure you check the elevation variance map before you embark to make sure it's all 0s.

2. Search for high rainfall, medium drainage. That tends to produce forests.

3. Modding out aquifers is a sure-fire way to make sure you don't get aquifers.

4. In advanced world gen parameters, turn up the starting and desired river source counts up. That'll make more brooks, which will join to form more streams, which will join to form more and bigger rivers. The biggest rivers will be found relatively close to oceans, so look around those.

5. Soil tends to get deeper near oceans, so, again, looking near oceans is likely to be beneficial.

6. I guess you'd need to go to the relatively-extreme north or south of your worlds, since oceans tend to make the areas around them less extreme in temperature.

7. Like with aquifers, modding out siltstone is a sure-fire way to make sure you don't get it. Also, DFHack's prospector feature now works (mostly) on the embark map, so if you want more than one suitable location, checking to see if their biomes have siltstone before you embark would help avoid it.

[Vehudur]

1. Turning the erosion cycle count up really high in advanced world gen tends to create flatter worlds. Otherwise, make sure you check the elevation variance map before you embark to make sure it's all 0s.

2. Search for high rainfall, medium drainage. That tends to produce forests.

3. Modding out aquifers is a sure-fire way to make sure you don't get aquifers.

4. In advanced world gen parameters, turn up the starting and desired river source counts up. That'll make more brooks, which will join to form more streams, which will join to form more and bigger rivers. The biggest rivers will be found relatively close to oceans, so look around those.

5. Soil tends to get deeper near oceans, so, again, looking near oceans is likely to be beneficial.

6. I guess you'd need to go to the relatively-extreme north or south of your worlds, since oceans tend to make the areas around them less extreme in temperature.

7. Like with aquifers, modding out siltstone is a sure-fire way to make sure you don't get it. Also, DFHack's prospector feature now works (mostly) on the embark map, so if you want more than one suitable location, checking to see if their biomes have siltstone before you embark would help avoid it.

1.  Already doing it.

2.  Also, elves.

3.  I've already done that.

4.  Check.

5.  Yeah, that's true.

6.  What?  Can't I just set the min temps for world gen and max temp for world gen to a certain range?  BUT I don't know what that is.

7.  I should do that, but I like the ore it tends to contain, so I'd need another sedimentary layer to replace it with.

EDIT:  I should clarify, I'm doing these in one way or another and still not having any luck.

[Hotaru]

You can increase erosion cycles beyond the maximum of 1000 by changing it in the world gen init text file (while not in the world gen, naturally)

I used to obsess over flat sites. Unlike many nonpermitted changes made there, this one actually seems to stick and have effect. So make it like 7,000. And set elevation variance very low. Worlds like this are very hard to gen, though. I may not remember it right, but when your world starts with a pancake shape, single mountain in the middle and circular huge flat island around it, you know you're doing it right.

Forest occurs with high rain, high drain (while swamp with high rain, low drain). So give high preference to high drainage and high rain. Also adjust the weight for preferred temperature range.

Also, tweak other variances very high, that way the same forest will be scorching in one embark position and freezing in the next - making it more likely you'll find something you like.

[Hotaru]

By the way, according to the wiki's biome section setting minimum drainage at 33 and minimum rain at 66 should mean a forest biome is always generated when possible. This may make it hard for civilizations to live, though.

[Vehudur]

I got it to work.

It's not ideal, but it works.

Also, all the humans died out in this world.  Dwarves and elves to rule the world!  Only one goblin civ.