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I had started a "builds" world (default world settings) in 1.12.2 some time ago and am adding new builds weekly, hence I decided to make the map like a big city, divided in areas by architectural style.

The Problem

The problem is terrain. I've tried to flatten it with WorldEdit (I have chosen my base level to be 63), but it leaves awful walls at the edges: Edges left after utilisng WorldEdit And WorldEdit's //smooth does a terrible job covering them (as seen bellow). WorldEdit's "smooth" tool is useless (thank you WE for the stairs)

What I've tried

1. World type: customised

I have tried playing around with the preset settings using this online tool (minecraft.tools) and most specifically with the "micro-relief" setting (I used low values). This did a great job in matters of flatness, but did some huge malformations with mountains (without touching anything else than micro-relief): mountain malformations These caves beneath are gigantic (600+ blocks), super common and sometimes even stacked vertically (as the ones in the upper part of the picture). Extremely steep cliffs are also not a rare sight. (On the bottom right you can see a piece of nice and flat plains).

2. World type: super flat (preset with decorations - ores, trees, etc.)

This is now way too flat. No rivers, hills, no regular mountains. It doesn't look natural.

What would be the perfect result?

Mountains and rivers (as a background/panorama) surrounding some big flat areas (plains, forests, etc.) with minimum elevation difference. If possible, I'm looking for some advice or tips on how to generate a world that is a combination of the two images below:

Default World (as a background to the scenery) default world screenshot

World with low values of "micro-relief" (land to build big mansions, houses, and cities) enter image description here

2 Answers 2

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If you are not adverse to using tools to edit the world outside of the game, WorldPainter may help you solve what you are after.

It is a self described map generator which "allows you to "paint" landscapes using similar tools as a regular paint program." which if you have not started building yet could help you flatten the landscape with what is essentially 3D painting tools for Minecraft.

I'm not currently in a location where I can test this program out myself, but it is worth a try. It's free, Open-Source and uses GPL. I've seen maps created with WorldPainter before, and if it allows you to create landscapes like this: enter image description here

Then flattening terrain should be a breeze. As the saying goes, if you want something done right, do it yourself (With the best tools you can get)

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  • This looks interesting. I will try it when I have the time Commented Feb 7, 2020 at 2:23
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There's no simple vanilla way to generate a world that I know of, that has a specific biome layout like a huge plain in the center and hills/mountains around - the best you can do is generate a 'large biomes' world, use a tool like AMIDST to find as big a plains biome as possible, then set world spawn there.

An easier option, that will unfortunately not provide the nice background mountains, is to generate a buffet world of nothing but plains:

enter image description here

The terrain is mostly flat, with occasional small hills, and the entire world is covered by this biome. To achieve this, pick Create New World, More World Options..., World Type: Buffet, Customize, Plains. Or Sunflower Plains, for extra sunflowers.

enter image description here

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  • Yes, but the problem is that even though the plains biome features minimum elevation, it is still enough to cause 6-block-tall walls when made flat. I could try to create a plains world with low micro-relief (so it's mainly flat) and try copy/paste some mountains using WorldEdit Commented Feb 7, 2020 at 2:25
  • @user10398534: I don't think there's a vanilla way to generate such terrain (maybe other than custom worldgen implemented as hundreds of command blocks). Maybe there are mods, but I don't know them.
    – SF.
    Commented Feb 8, 2020 at 0:26

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