Alright, how do I even start making ore gen? I have my ores ready and I just need to know how to register them properly.
I've never dealt with world gen, so I don't know much about it.

use the vanilla registry of ConfiguredFeature inside the FMLCommonSetupEvent

3 hours ago, Luis_ST said:

use the vanilla registry of ConfiguredFeature inside the FMLCommonSetupEvent

Does this mean I shouldn't use DeferredRegister? Do you have any good examples I can use?

I made use of this tutorial when learning ore gen: https://www.youtube.com/watch?v=8s1x4Z87Aw8

1 minute ago, DireTook said:

I made use of this tutorial when learning ore gen: https://www.youtube.com/watch?v=8s1x4Z87Aw8

I'll check it out. Thanks!

you shouldn't use the tutorial, its 1.16.4 and the levelgen has changed in 1.17
the tutorial never registered the ConfiguredFeature correctly
this is the code you need to run side the FMLCommonSetupEvent:

	private static <FC extends FeatureConfiguration> ConfiguredFeature<FC, ?> register(String name, ConfiguredFeature<FC, ?> configuredFeature) {
		return Registry.register(BuiltinRegistries.CONFIGURED_FEATURE, new ResourceLocation(Nero.MOD_ID, name), configuredFeature);
	}