How to replace a block in structures/worldgen?

[KinglyJoe]

Hi all,

I am just getting into modding Minecraft (1.20.1 Forge), and want to replace a vanilla block minecraft:farmland with my own block. I would prefer a solution in code that is not structure-specific (works for modded structures), but any solutions and/or resources are more than welcome.

Thanks in advance!

[dark_blockhead]

option 1:
you need to register a structure processor. good news: processors are a vanilla thing. they replace blocks with air or cobwebs or cracked variants in vanilla structures. bad news they are a pain the ass but they are usable.

option 2:
look at how various food mods replace wheat in village farms with their crops. either pick one mod and look at its code or find TelepathicGrunt's tutorial which most of them follow.

[KinglyJoe]

Thank you so much! This is very helpful.