Etwahl

That did the trick, thanks !

I removed all the comments but it didn't help. It still generate just a few layers per chunk. (I counted 32 layers).

Thank you all for the replies. I have tried your solution and it works. However, when I attempt to make a lot of layers I get a weird, unfinished world generation (pictured below). Here is the custom file I used. I went over it and spotted no mistakes so I feel like it is an issue related to the number of layers I want to generate. { "code": "superflatworldgen", "blockCodes": [ "creativeblock-32", // 3rd warning layer before void. 1 Layer before void. Red coloured block. Last layer. "creativeblock-34", // 2nd warning layer before void. 2 Layers before void. "creativeblock-34", // 2nd warning layer before void. 3 Layers before void. Orange coloured block. "creativeblock-36", // 1st warning layer before void. 4 Layers before void. "creativeblock-36", // 1st warning layer before void. 5 Layers before void. "creativeblock-36", // 1st warning layer before void. 6 Layers before void. Yellow coloured block. "rock-obsidian", // Last layer of obsidian, 10 in total "rock-obsidian", // Obsidian "rock-obsidian", // Obsidian "rock-obsidian", // Obsidian "rock-obsidian", // Obsidian "rock-obsidian", // Obsidian "rock-obsidian", // Obsidian "rock-obsidian", // Obsidian "rock-obsidian", // Obsidian "rock-obsidian", // First layer of obsidian "rock-basalt", // Last layer of basalt, 10 in total "rock-basalt", // Basalt "rock-basalt", // Basalt "rock-basalt", // Basalt "rock-basalt", // Basalt "rock-basalt", // Basalt "rock-basalt", // Basalt "rock-basalt", // Basalt "rock-basalt", // Basalt "rock-basalt", // First layer of basalt "rock-chert", // Last layer of chert, 10 in total "rock-chert", // Chert "rock-chert", // Chert "rock-chert", // Chert "rock-chert", // Chert "rock-chert", // Chert "rock-chert", // Chert "rock-chert", // Chert "rock-chert", // Chert "rock-chert", // First layer of chert "rock-conglomerate", // Last layer of conglomerate, 10 in total "rock-conglomerate", // Conglomerate "rock-conglomerate", // Conglomerate "rock-conglomerate", // Conglomerate "rock-conglomerate", // Conglomerate "rock-conglomerate", // Conglomerate "rock-conglomerate", // Conglomerate "rock-conglomerate", // Conglomerate "rock-conglomerate", // Conglomerate "rock-conglomerate", // First layer of conglomerate "rock-andesite", // Last layer of andesite, 10 in total "rock-andesite", // Andesite "rock-andesite", // Andesite "rock-andesite", // Andesite "rock-andesite", // Andesite "rock-andesite", // Andesite "rock-andesite", // Andesite "rock-andesite", // Andesite "rock-andesite", // Andesite "rock-andesite", // First layer of andesite "rock-granite", // Last layer of granite, 10 in total "rock-granite", // Granite "rock-granite", // Granite "rock-granite", // Granite "rock-granite", // Granite "rock-granite", // Granite "rock-granite", // Granite "rock-granite", // Granite "rock-granite", // Granite "rock-granite", // First layer of granite "rock-limestone", // Last layer of limestone, 10 in total "rock-limestone", // Limestone "rock-limestone", // Limestone "rock-limestone", // Limestone "rock-limestone", // Limestone "rock-limestone", // Limestone "rock-limestone", // Limestone "rock-limestone", // Limestone "rock-limestone", // Limestone "rock-limestone", // First layer of limestone "soil-medium-none", // Last layer of dirt, 5 in total "soil-medium-none", // Dirt "soil-medium-none", // Dirt "soil-medium-none", // Dirt layer (Regular Medium Soil) "soil-medium-normal" // Surface layer (Grassy Medium Soil) ] } It it supposed to generate a layer of Grass and 4 layers of dirt, follower by 10 thick layers of limestone, granite, andesite, conglomerate, chert, basalt and obsidian. Finally, I generate a layer of Creative Blocks, to mark the void approaching. It's 3 layers of Yellow, 2 layers of Orange and 1 layer of Red.

I'm using a superflat world to come up with and build a few houses designs but when I wanted to try to make a cellar, I noticed my world was 3 blocks deep. I looked in the world generation settings but saw no options there. Is there any way to do that or do I have to generate a "regular" world for that ?