AI ProBuilder

At a glance

What the agent can do with it

Adds no MCP tools: it contributes an RQL module with the probuilder source, the probuilder.facing, probuilder.edges, probuilder.openEdges, probuilder.vertices functions and adapters for ProBuilderMesh. That powers 4 capabilities the agent reaches through rql-query / rql-mutate. How RQL works →

• Create ProBuilder shapes

  Create editable shapes (cube, cylinder …) and extruded polygon shapes, or merge several meshes into one.

  probuilder | call CreateShape("Cube", "Crate", "(2, 1, 2)", "(0, 0.5, 0)")
• Inspect meshes

  Read face, vertex and edge counts, bounds and materials, list faces with their direction, and pick faces by direction (up, down, left …).

  probuilder | get meshes | where gameObject.name == "Crate" | select faceCount vertexCount edgeCount bounds materials
• Edit meshes

  Extrude faces; bevel, bridge, connect and subdivide edges; delete faces, flip normals and move the pivot. Every edit is validated and undoable.

  probuilder | get meshes | where gameObject.name == "Crate" | call Extrude(probuilder.facing($, "Up"), 0.5)
• Face materials

  Assign a material to chosen faces of a ProBuilder mesh.

  probuilder | get meshes | where gameObject.name == "Crate" | call SetFaceMaterial(probuilder.facing($, "Up"), "Assets/Materials/Grass.mat")

See it in the Unity catalog →

Install

Requires the base plugin com.ivanmurzak.unity.mcp. After installing, the RQL module loads with the package — the agent sees it in rql-schema.

When to ask the AI for it

Ask for blockout / greybox geometry and in-editor mesh editing without leaving Unity.

Example prompts

Copy-pasteable first requests. Start with one, verify it in the editor, then build up.

1. Create a ProBuilder cube 4×3×4 at the origin and name it `Room`.

2. Extrude the top face of `Room` up by 2 units, then assign the `Concrete` material to it.

Keep going