Improved Maps

Evidence

Ran on Kiln's test stand (2026-11-04): ImprovedMaps did not start: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/common/custom/CustomPacketPayload; ImprovedMapsClient did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/resource/IdentifiableResourceReloadListener.

What it needs from Kiln

• an access widener
• Mixin
• com.mojang.blaze3d.platform.Window
• io.netty.buffer.ByteBuf
• io.netty.handler.codec.DecoderException
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents.Disconnect
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking.Context
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking.PlayPayloadHandler
• net.fabricmc.fabric.api.client.rendering.v1.ClientTooltipComponentCallback
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents.StartTick
• net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents.Disconnect
• net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking
• net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking.Context
• net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking.PlayPayloadHandler
• net.fabricmc.fabric.api.networking.v1.context.PacketContext
• net.fabricmc.fabric.api.resource.ResourceManagerHelper
• net.fabricmc.fabric.api.resource.SimpleSynchronousResourceReloadListener
• net.minecraft.client.gui.screens.inventory.tooltip.ClientBundleTooltip
• net.minecraft.client.renderer.BiomeColors
• net.minecraft.client.renderer.MapRenderer
• net.minecraft.client.renderer.RenderPipelines
• net.minecraft.client.renderer.state.MapRenderState
• net.minecraft.client.renderer.state.MapRenderState.MapDecorationRenderState
• net.minecraft.client.resources.MapTextureManager
• net.minecraft.core.RegistryAccess
• net.minecraft.core.component.DataComponentMap
• net.minecraft.core.component.DataComponentMap.Builder
• net.minecraft.core.component.DataComponentType
• net.minecraft.core.component.DataComponentType.Builder
• net.minecraft.core.component.DataComponents
• net.minecraft.network.VarInt
• net.minecraft.network.chat.Style
• net.minecraft.network.codec.ByteBufCodecs
• net.minecraft.network.codec.StreamCodec
• net.minecraft.network.protocol.common.custom.CustomPacketPayload
• net.minecraft.network.protocol.common.custom.CustomPacketPayload.Type
• net.minecraft.network.protocol.common.custom.CustomPacketPayload.TypeAndCodec
• and 73 more

On the roadmap: Minecraft's libraries and client API (0.2), Code next to data (0.3), Machines (0.4), Mixin (0.5)

In the author's words

Server-side mod (with optional client-side features) implementing Atlases and other map features

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file improved-maps-1.1+mc26.3.jar. The scan reads the mod's classes; it does not run them.