Kursach_StealthAction/.opencode/skills/probuilder-set-face-material/SKILL.md

name	description	metadata
probuilder-set-face-material	Assign a material to specific faces of a `ProBuilderMesh`, enabling multi-material meshes (e.g., grass on top, dirt on sides). Supply either `faceIndices` (explicit) or `faceDirection` (semantic); exactly one is required.	generated-by mcp-plugin-dotnet

Set material on ProBuilder faces

Assign a material to specific faces of a ProBuilderMesh, enabling multi-material meshes where different faces have different materials (e.g., grass on top, dirt on the sides).

Inputs

• gameObjectRef — the GameObject hosting the ProBuilderMesh component.
• materialPath — project path to the material asset (e.g., Assets/Materials/Grass.mat) or a bare material name. Required.
• faceIndices — explicit array of face indices.
• faceDirection — semantic alternative (Up, Down, Left, Right, Forward, Back). Exactly one of faceIndices / faceDirection is required.

Examples

• Set material on the top face: faceDirection="up".
• Set material on specific faces: faceIndices=[0, 2, 4].

Behavior

The mesh is rebuilt (ToMesh → Refresh), dirty-flagged, and the Editor repaints. The whole call runs on the Unity main thread.

How to Call

unity-mcp-cli run-tool probuilder-set-face-material --input '{
  "gameObjectRef": "string_value",
  "materialPath": "string_value",
  "faceIndices": [],
  "faceDirection": "string_value"
}'

For complex input (multi-line strings, code), save the JSON to a file and use:

unity-mcp-cli run-tool probuilder-set-face-material --input-file args.json

Or pipe via stdin (recommended):

unity-mcp-cli run-tool probuilder-set-face-material --input-file - <<'EOF'
{"param": "value"}
EOF

Troubleshooting

If unity-mcp-cli is not found, either install it globally (npm install -g unity-mcp-cli) or use npx unity-mcp-cli instead. Read the /unity-initial-setup skill for detailed installation instructions.

Input

Name	Type	Required	Description
gameObjectRef	string	Yes	Reference to the GameObject with a ProBuilderMesh component. RQL: GameObjectRef
materialPath	string	Yes	Path to the material asset (e.g., 'Assets/Materials/MyMaterial.mat') or material name.
faceIndices	array	No	Array of face indices to apply the material to. Use this OR faceDirection, not both. Use ProBuilder_GetMeshInfo to get valid face indices.
faceDirection	string	No	Semantic face selection by direction. Use this OR faceIndices, not both.

Input JSON Schema

{
  "type": "object",
  "properties": {
    "gameObjectRef": {
      "type": "string"
    },
    "materialPath": {
      "type": "string"
    },
    "faceIndices": {
      "type": "array",
      "items": {
        "type": "integer"
      }
    },
    "faceDirection": {
      "type": "string",
      "enum": [
        "Up",
        "Down",
        "Left",
        "Right",
        "Forward",
        "Back"
      ]
    }
  },
  "required": [
    "gameObjectRef",
    "materialPath"
  ]
}

Output

This tool does not return structured output.