Natural Waters

Evidence

Ran on Kiln's test stand (2026-11-04): NaturalWatersFabric did not start: java.lang.NoClassDefFoundError: net/minecraft/core/RegistryAccess; NaturalWatersFabricClient did not start: java.lang.NoClassDefFoundError: net/minecraft/world/level/material/Fluid.

What it needs from Kiln

• an access widener
• Mixin
• com.mojang.blaze3d.platform.NativeImage
• net.fabricmc.fabric.api.client.render.fluid.v1.FluidRenderingRegistry
• net.fabricmc.fabric.api.client.rendering.v1.ColorResolverRegistry
• net.minecraft.client.color.block.BlockTintSource
• net.minecraft.client.renderer.BiomeColors
• net.minecraft.client.renderer.block.BlockAndTintGetter
• net.minecraft.client.renderer.block.FluidModel
• net.minecraft.client.renderer.block.FluidModel.Unbaked
• net.minecraft.client.renderer.block.FluidStateModelSet
• net.minecraft.client.resources.model.sprite.Material
• net.minecraft.core.HolderLookup.RegistryLookup
• net.minecraft.core.RegistryAccess
• net.minecraft.core.RegistryAccess.Frozen
• net.minecraft.network.codec.ByteBufCodecs
• net.minecraft.network.codec.StreamCodec
• net.minecraft.network.codec.StreamCodec.CodecOperation
• net.minecraft.resources.FileToIdConverter
• net.minecraft.server.packs.PackResources
• net.minecraft.server.packs.PackResources.ResourceOutput
• net.minecraft.server.packs.PackType
• net.minecraft.server.packs.resources.IoSupplier
• net.minecraft.server.packs.resources.Resource
• net.minecraft.server.packs.resources.ResourceManager
• net.minecraft.server.packs.resources.SimpleJsonResourceReloadListener
• net.minecraft.tags.TagKey
• net.minecraft.util.ARGB
• net.minecraft.util.ExtraCodecs
• net.minecraft.world.attribute.EnvironmentAttributeMap
• net.minecraft.world.attribute.EnvironmentAttributeMap.Builder
• net.minecraft.world.attribute.EnvironmentAttributes
• net.minecraft.world.attribute.modifier.FloatModifier
• net.minecraft.world.level.biome.Biome
• net.minecraft.world.level.material.Fluids
• net.minecraft.world.level.material.Fluid
• Minecraft.getResourceManager()
• ClientPacketListener.registryAccess()
• Holder.is()
• Registries.BIOME
• Identifier.withPath()
• Blocks.BUBBLE_COLUMN
• and 1 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

Bring bright, colorful waters from Bedrock to Java. Easy to tweak and enjoy!

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file naturalwaters-v26.3.0-mc26.3.x+fabric.jar. The scan reads the mod's classes; it does not run them.