VoxelMap x SeedMapper (VoxelMapper)

Evidence

Ran on Kiln's test stand (2026-11-04): VoxelMapFabricClientMod did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/networking/v1/PayloadTypeRegistry.

What it needs from Kiln

• an access widener
• Mixin
• com.mojang.authlib.GameProfile
• com.mojang.blaze3d.ProjectionType
• com.mojang.blaze3d.buffers.Std140Builder
• com.mojang.blaze3d.pipeline.RenderTarget
• com.mojang.blaze3d.platform.InputConstants.Key
• com.mojang.blaze3d.platform.Lighting
• com.mojang.blaze3d.platform.NativeImage
• com.mojang.blaze3d.platform.NativeImage.Format
• com.mojang.blaze3d.platform.TextureUtil
• com.mojang.blaze3d.platform.Transparency
• com.mojang.blaze3d.platform.Window
• com.mojang.blaze3d.platform.cursor.CursorTypes
• com.mojang.blaze3d.systems.RenderSystem
• com.mojang.blaze3d.systems.SamplerCache
• com.mojang.blaze3d.systems.ScissorState
• com.mojang.blaze3d.vertex.PoseStack
• com.mojang.blaze3d.vertex.PoseStack.Pose
• com.mojang.blaze3d.vertex.QuadInstance
• com.mojang.blaze3d.vertex.VertexConsumer
• com.mojang.math.Axis
• com.mojang.realmsclient.client.RealmsClient
• com.mojang.realmsclient.dto.RealmsServer
• com.mojang.realmsclient.dto.RealmsServerList
• com.mojang.renderpearl.api.GpuFormat
• com.mojang.renderpearl.api.buffers.GpuBuffer
• com.mojang.renderpearl.api.buffers.GpuBufferSlice
• com.mojang.renderpearl.api.buffers.GpuBufferSlice.MappedView
• com.mojang.renderpearl.api.commands.CommandEncoder
• com.mojang.renderpearl.api.commands.RenderPass
• com.mojang.renderpearl.api.device.DeviceInfo
• com.mojang.renderpearl.api.device.DeviceLimits
• com.mojang.renderpearl.api.device.GpuDevice
• com.mojang.renderpearl.api.pipeline.BlendFunction
• com.mojang.renderpearl.api.pipeline.ColorTargetState
• com.mojang.renderpearl.api.pipeline.CompareOp
• com.mojang.renderpearl.api.pipeline.DepthStencilState
• com.mojang.renderpearl.api.pipeline.RenderPipeline
• com.mojang.renderpearl.api.pipeline.RenderPipeline.Builder
• com.mojang.renderpearl.api.pipeline.RenderPipeline.Snippet
• com.mojang.renderpearl.api.textures.AddressMode
• and 80 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

VoxelMap x SeedMapper is a heavily modified fork of VoxelMap that integrates SeedMapper directly into the client and extends VoxelMap with advanced chunk overlays, data sharing, and world-map tooling.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file voxelmap-x-seedmapper_26.3_fabric_v0.15.jar. The scan reads the mod's classes; it does not run them.