Material Rule Compiler

Calls something that is on Kiln's roadmap. Parts of it may already run.

Evidence

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

What it needs from Kiln

an access widener
Mixin
net.minecraft.SharedConstants
net.minecraft.core.HolderSet
net.minecraft.server.level.WorldGenRegion
net.minecraft.util.BitStorage
net.minecraft.util.InclusiveRange
net.minecraft.util.Mth
net.minecraft.world.level.ChunkPos
net.minecraft.world.level.LevelHeightAccessor
net.minecraft.world.level.biome.Biome
net.minecraft.world.level.biome.BiomeManager
net.minecraft.world.level.chunk.ChunkAccess
net.minecraft.world.level.chunk.LevelChunkSection
net.minecraft.world.level.chunk.Palette
net.minecraft.world.level.chunk.PalettedContainer
net.minecraft.world.level.chunk.PalettedContainer.Data
net.minecraft.world.level.chunk.PalettedContainerRO
net.minecraft.world.level.chunk.SingleValuePalette
net.minecraft.world.level.chunk.status.ChunkStatus
net.minecraft.world.level.levelgen.LegacyRandomSource
net.minecraft.world.level.levelgen.LegacyRandomSource.LegacyPositionalRandomFactory
net.minecraft.world.level.levelgen.PositionalRandomFactory
net.minecraft.world.level.levelgen.RandomState
net.minecraft.world.level.levelgen.VerticalAnchor
net.minecraft.world.level.levelgen.WorldGenerationContext
net.minecraft.world.level.levelgen.XoroshiroRandomSource
net.minecraft.world.level.levelgen.XoroshiroRandomSource.XoroshiroPositionalRandomFactory
net.minecraft.world.level.levelgen.material.MaterialRuleContext
net.minecraft.world.level.levelgen.material.MaterialRules
net.minecraft.world.level.levelgen.material.MaterialRules.DensityGetter
net.minecraft.world.level.levelgen.material.condition.AbovePreliminarySurfaceCondition
net.minecraft.world.level.levelgen.material.condition.BiomeCondition
net.minecraft.world.level.levelgen.material.condition.ConditionEvaluator
net.minecraft.world.level.levelgen.material.condition.HoleCondition
net.minecraft.world.level.levelgen.material.condition.MaterialCondition
net.minecraft.world.level.levelgen.material.condition.MaterialCondition.HolderHolder
net.minecraft.world.level.levelgen.material.condition.NotCondition
net.minecraft.world.level.levelgen.material.condition.SteepCondition
net.minecraft.world.level.levelgen.material.condition.StoneDepthCondition
net.minecraft.world.level.levelgen.material.condition.TemperatureCondition
net.minecraft.world.level.levelgen.material.condition.VerticalGradientCondition
and 14 more

On the roadmap: Minecraft's libraries and client API (0.2), Code next to data (0.3), Mixin (0.5)

In the author's words

A vanilla worldgen optimization mod. Works by compiling material rules to bytecode and optimizing material rules.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file zmatcomp-1.1.4+26.3.jar. The scan reads the mod's classes; it does not run them.

Reports from players

No reports from players yet.

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