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Fermisloth
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probuilder-delete-faces

Deletes selected faces from a ProBuilder mesh by index or direction.

1|Updated Apr 1, 2026
Search Tags:#unity#level design#3d modeling#probuilder#unity-mcp-cli#mesh editing#face deletion
One-click install
npx skills add https://github.com/Fermisloth/Project-Aegis-Adaptive-Outbreak-Containment --skill probuilder-delete-faces-fermisloth
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: probuilder-delete-faces
Source: https://github.com/Fermisloth/Project-Aegis-Adaptive-Outbreak-Containment/tree/main/.agent/skills/probuilder-delete-faces
Command: npx skills add https://github.com/Fermisloth/Project-Aegis-Adaptive-Outbreak-Containment --skill probuilder-delete-faces-fermisloth

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires unity-mcp-cli.

What problem does it solve? Removing unwanted geometry from ProBuilder meshes in Unity normally requires manual face selection in the editor. This Skill deletes faces programmatically through the unity-mcp-cli, either by explicit face indices or by semantic direction, creating holes or trimming geometry without manual editor work. ## Core Features & Use Cases - Index-Based Deletion: Delete specific faces by passing an array of face indices obtained from ProBuilder_GetMeshInfo. - Direction-Based Deletion: Select faces semantically by direction (Up, Down, Left, Right, Forward, Back) instead of numeric indices. - Detailed Result Reporting: Returns deleted face count, removed vertices, and updated mesh totals for faces, vertices, and edges. - Use Case: While prototyping a level blockout, delete the bottom face of a ProBuilder cube with faceDirection="down" to create an open container, then verify the new mesh totals from the response. ## Quick Start Ask the AI to delete the bottom face of your ProBuilder cube by running the probuilder-delete-faces tool with the GameObject reference and faceDirection set to down.

Frequently Asked Questions about probuilder-delete-faces

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I delete faces from a ProBuilder mesh in Unity?▼

Run the probuilder-delete-faces tool through unity-mcp-cli with a gameObjectRef pointing to the ProBuilder object. Provide either faceIndices for specific faces or faceDirection for semantic selection, and the tool removes them and reports updated mesh counts.

How do I find valid face indices for a ProBuilder mesh?▼

Use the ProBuilder_GetMeshInfo tool to retrieve valid face indices for the target mesh before deleting. Pass those indices in the faceIndices array when calling probuilder-delete-faces.

Can I select ProBuilder faces by direction instead of index?▼

Yes, the faceDirection parameter accepts Up, Down, Left, Right, Forward, or Back for semantic face selection. Use either faceDirection or faceIndices, not both in the same call.

What happens if unity-mcp-cli is not found when running the tool?▼

Install the CLI globally with npm install -g unity-mcp-cli, or invoke it through npx unity-mcp-cli instead. The unity-initial-setup skill contains detailed installation instructions.

What does deleting ProBuilder faces do to the mesh?▼

Deleting faces creates holes in the mesh or removes geometry entirely. The response reports deletedFaceCount, verticesRemoved, and the new total face, vertex, and edge counts so you can verify the result.

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