Blockbench Modeling

jasonjgardner/blockbench-mcp-project/.claude/skills/blockbench-modeling

by jasonjgardnere9c29a93e54bdd9aaa8a308196dfd4147e47d88cNo licenseListed Oct 9, 2026Updated Oct 9, 2026

Create and edit 3D models in Blockbench using MCP tools. Use when building geometry with cubes, creating meshes, placing spheres/cylinders, editing vertices, extruding faces, or organizing models with groups. Covers both cube-based Minecraft modeling and freeform mesh editing.

Instructions onlyDesign & Creative

AI-generated overview

Guides 3D model creation and editing in Blockbench via MCP tools, covering cubes, meshes, and group hierarchies.

What it does: This skill provides instructions for building and editing 3D models in Blockbench through MCP tools. It documents cube tools for placing and modifying cubes with position, size, rotation, and texture, mesh tools for spheres, cylinders, extrusion, subdivision, vertex editing, merging, and knife cuts, and element tools for groups, duplication, renaming, and deletion. It also supplies worked patterns such as a Minecraft-style character hierarchy and a smooth organic shape, plus usage tips.
When to use it: Use it when creating or editing 3D geometry in Blockbench, whether cube-based Minecraft-style modeling or freeform mesh editing. It fits tasks involving placing cubes, spheres, or cylinders, extruding faces, editing vertices, or organizing models into groups.
Requirements: Requires Blockbench with the referenced MCP modeling tools available to the agent. No scripts are shipped; the skill is instructions only.

Blockbench Modeling

Build 3D models using cubes and meshes in Blockbench.

Available Tools

Cube Tools

Mesh Tools

Tool	Purpose
`place_mesh`	Create mesh with vertices
`create_sphere`	Create sphere mesh
`create_cylinder`	Create cylinder mesh
`extrude_mesh`	Extrude faces/edges/vertices
`subdivide_mesh`	Add geometry detail
`select_mesh_elements`	Select vertices/edges/faces
`move_mesh_vertices`	Move selected vertices
`delete_mesh_elements`	Remove geometry
`merge_mesh_vertices`	Weld nearby vertices
`create_mesh_face`	Create face from vertices
`knife_tool`	Cut edges into faces

Element Tools

Cube Modeling

Place a Cube

Place Multiple Cubes

place_cube: elements=[  {name: "head", from: [-4, 12, -4], to: [4, 20, 4]},  {name: "arm_left", from: [4, 4, -1], to: [6, 12, 1]},  {name: "arm_right", from: [-6, 4, -1], to: [-4, 12, 1]}], group="body"

Modify Cube

Cube with Texture

Mesh Modeling

Create Sphere

Create Cylinder

Extrude Face

Subdivide for Detail

Move Vertices

Merge Close Vertices

Knife Cut

Organization

Create Group Hierarchy

Add Cubes to Groups

Duplicate Element

View Hierarchy

Common Patterns

Minecraft Character

# Create hierarchyadd_group: name="root", origin=[0, 0, 0]add_group: name="body", parent="root", origin=[0, 24, 0]add_group: name="head", parent="body", origin=[0, 24, 0]add_group: name="arm_left", parent="body", origin=[5, 22, 0]add_group: name="arm_right", parent="body", origin=[-5, 22, 0]add_group: name="leg_left", parent="root", origin=[2, 12, 0]add_group: name="leg_right", parent="root", origin=[-2, 12, 0]
# Add geometryplace_cube: elements=[{name: "head", from: [-4, 24, -4], to: [4, 32, 4]}], group="head"place_cube: elements=[{name: "body", from: [-4, 12, -2], to: [4, 24, 2]}], group="body"place_cube: elements=[{name: "arm", from: [-1, 0, -1], to: [1, 10, 1]}], group="arm_left"place_cube: elements=[{name: "arm", from: [-1, 0, -1], to: [1, 10, 1]}], group="arm_right"place_cube: elements=[{name: "leg", from: [-2, 0, -2], to: [2, 12, 2]}], group="leg_left"place_cube: elements=[{name: "leg", from: [-2, 0, -2], to: [2, 12, 2]}], group="leg_right"

Smooth Organic Shape

create_sphere: elements=[{name: "base", position: [0, 8, 0], diameter: 16, sides: 16}]subdivide_mesh: mesh_id="base", cuts=1# Select and move vertices to shapeselect_mesh_elements: mesh_id="base", mode="vertex"move_mesh_vertices: offset=[0, 4, 0], vertices=["top_verts"]

Tips

Use list_outline to see current model structure
Set group origins at joint/pivot points for animation
Use faces=true for auto UV mapping on cubes
Create bone hierarchy before adding geometry
Use duplicate_element with offset for symmetrical parts
Mesh editing is more flexible but cubes are simpler for Minecraft-style models

Source and attribution

Source:jasonjgardner/blockbench-mcp-projectin.claude/skills/blockbench-modelingat commite9c29a9

License: No license

Content belongs to its original authors. SourceWeft indexes it from a public repository.

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place_cube: elements=[  {name: "head", from: [-4, 12, -4], to: [4, 20, 4]},  {name: "arm_left", from: [4, 4, -1], to: [6, 12, 1]},  {name: "arm_right", from: [-6, 4, -1], to: [-4, 12, 1]}], group="body"

# Create hierarchyadd_group: name="root", origin=[0, 0, 0]add_group: name="body", parent="root", origin=[0, 24, 0]add_group: name="head", parent="body", origin=[0, 24, 0]add_group: name="arm_left", parent="body", origin=[5, 22, 0]add_group: name="arm_right", parent="body", origin=[-5, 22, 0]add_group: name="leg_left", parent="root", origin=[2, 12, 0]add_group: name="leg_right", parent="root", origin=[-2, 12, 0]
# Add geometryplace_cube: elements=[{name: "head", from: [-4, 24, -4], to: [4, 32, 4]}], group="head"place_cube: elements=[{name: "body", from: [-4, 12, -2], to: [4, 24, 2]}], group="body"place_cube: elements=[{name: "arm", from: [-1, 0, -1], to: [1, 10, 1]}], group="arm_left"place_cube: elements=[{name: "arm", from: [-1, 0, -1], to: [1, 10, 1]}], group="arm_right"place_cube: elements=[{name: "leg", from: [-2, 0, -2], to: [2, 12, 2]}], group="leg_left"place_cube: elements=[{name: "leg", from: [-2, 0, -2], to: [2, 12, 2]}], group="leg_right"

create_sphere: elements=[{name: "base", position: [0, 8, 0], diameter: 16, sides: 16}]subdivide_mesh: mesh_id="base", cuts=1# Select and move vertices to shapeselect_mesh_elements: mesh_id="base", mode="vertex"move_mesh_vertices: offset=[0, 4, 0], vertices=["top_verts"]