Cave Mushroom Fix

Evidence

Server-side mod: Kiln runs mods' code on Horizon's single-player server, not on dedicated servers.

What it needs from Kiln

• net.fabricmc.fabric.api.biome.v1.BiomeModifications
• net.fabricmc.fabric.api.biome.v1.BiomeSelectors
• net.minecraft.tags.BlockTags
• net.minecraft.world.level.WorldGenLevel
• net.minecraft.world.level.biome.Biomes
• net.minecraft.world.level.chunk.ChunkGenerator
• net.minecraft.world.level.levelgen.GenerationStep
• net.minecraft.world.level.levelgen.GenerationStep.Decoration
• net.minecraft.world.level.levelgen.feature.Feature
• BuiltInRegistries.FEATURE_TYPE
• Registries.PLACED_FEATURE
• Blocks.BROWN_MUSHROOM
• Blocks.GLOW_LICHEN
• Blocks.MOSS_BLOCK
• Blocks.MOSS_CARPET
• Blocks.RED_MUSHROOM
• Blocks.SCULK
• Blocks.SCULK_VEIN
• BlockState.canSurvive()
• BlockState.is()
• BlockState.isSolidRender()

On the roadmap: Code next to data (0.3)

In the author's words

This mod restores mushroom spawning in caves. Mushrooms will now spawn in caves as they did before version 1.18. This fixes MC-244162.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file cavemushroomfix-fabric-1.0.0+26.3.jar. The scan reads the mod's classes; it does not run them.