Screenshot / Camera

Captures a screenshot from a camera and returns it as an image. If no camera is specified, uses the Main Camera. Returns the image directly for visual inspection by the LLM.

Inputs

• cameraRef (optional) — reference to a GameObject hosting a Camera. When null, Camera.main is used; if there is no main camera, the first entry of Camera.allCameras is used.
• width (default 1920) / height (default 1080) — output pixels. Must be > 0 and ≤ MaxDimension.

Behavior

Allocates a temporary RenderTexture, swaps it onto the chosen camera, calls Camera.Render, reads back via Texture2D.ReadPixels, encodes as PNG, and restores the camera's prior targetTexture. Returns a ResponseCallTool.Image with image/png MIME and a descriptive caption.

How to Call

unity-mcp-cli run-tool screenshot-camera --input '{
  "cameraRef": "string_value",
  "width": 0,
  "height": 0
}'

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

unity-mcp-cli run-tool screenshot-camera --input-file args.json

Or pipe via stdin (recommended):

unity-mcp-cli run-tool screenshot-camera --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
cameraRef	any	No	Reference to the camera GameObject. If not specified, uses the Main Camera.
width	integer	No	Width of the screenshot in pixels.
height	integer	No	Height of the screenshot in pixels.

Input JSON Schema

{
  "type": "object",
  "properties": {
    "cameraRef": {
      "$ref": "#/$defs/AIGD.GameObjectRef"
    },
    "width": {
      "type": "integer"
    },
    "height": {
      "type": "integer"
    }
  },
  "$defs": {
    "UnityEngine.EntityId": {
      "type": "string",
      "pattern": "^[0-9]+$"
    },
    "System.Type": {
      "type": "string"
    },
    "AIGD.GameObjectRef": {
      "type": "object",
      "properties": {
        "instanceID": {
          "$ref": "#/$defs/UnityEngine.EntityId",
          "description": "instanceID of the UnityEngine.Object. If it is '0' and 'path', 'name', 'assetPath' and 'assetGuid' is not provided, empty or null, then it will be used as 'null'. Priority: 1 (Recommended)"
        },
        "path": {
          "type": "string",
          "description": "Path of a GameObject in the hierarchy Sample 'character/hand/finger/particle'. Priority: 2."
        },
        "name": {
          "type": "string",
          "description": "Name of a GameObject in hierarchy. Priority: 3."
        },
        "assetType": {
          "$ref": "#/$defs/System.Type",
          "description": "Type of the asset."
        },
        "assetPath": {
          "type": "string",
          "description": "Path to the asset within the project. Starts with 'Assets/'"
        },
        "assetGuid": {
          "type": "string",
          "description": "Unique identifier for the asset."
        }
      },
      "required": [
        "instanceID"
      ],
      "description": "Find GameObject in opened Prefab or in the active Scene."
    }
  }
}

Output

This tool does not return structured output.