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UGUI Minimap

The Minimap UGUI prefab provides a minimap built with Unity's uGUI system.

Prefab Structure

Minimap UGUI
├── Minimap Camera          ← orthographic camera, renders to Minimap RT
├── Camera Frustum Box      ← LineRenderer showing the main camera's view area
└── UI Canvas
│   └── Minimap Image       ← UGUI Image displaying Minimap RT
└── EventSystem

Setup

  1. Drag the Minimap UGUI prefab into your scene.
  2. Adjust the Minimap Camera's orthographic size and distance to fully cover the game map.
  3. Assign the Minimap Camera and the Camera Frustum Box LineRenderer to a dedicated rendering layer (e.g. Minimap). This is already done in the prefab, but you will be missing the layers in your project if you just imported this, or they might have overwritten yoru own layers, so double check to make sure.
  4. Remove the minimap layer from the main game camera's Culling Mask so the frustum box is invisible in the main view.
  5. Set the Bound Camera on MinimapCameraBinderUGUI to your game camera controller.
  6. Set the Camera on MinimapFrustumBox to your main game camera.

Configuration

Minimap Camera

Field Value
Target Texture The Minimap RT Render Texture asset
Culling Mask The layers you want visible on the minimap
Projection Orthographic

You can adjust the Render Texture resolution to get the fidelity you need - larger textures give a sharper minimap but use more memory.

MinimapFrustumBox

Field Description
Camera Frustum Box Renderer The LineRenderer on this GameObject
Camera Your main game camera
Ground Layer Mask Layer(s) used as the ground for frustum ray projection. Leave empty if you don't need the box to follow terrain elevation
Camera View Display Vertical Offset Lifts the line slightly above the ground to prevent clipping
Max Distance Fallback Fallback projection distance if the ground raycast misses. Increase this for cameras that pitch steeply or use free look
Line Color / Width Increase width to avoid aliasing if the rendered line appears too thin

MinimapCameraBinderUGUI

Found on the UI Canvas > Minimap Image game object.

Field Description
Minimap Rect The RectTransform of the Minimap Image
Bound Camera Your game camera controller
Input Button Mouse button used to interact with the minimap (default: Left)

UGUICameraInputBlocker

Found on the UI Canvas > Minimap Image game object.

Field Description
Active Cursor State The ActiveCursorStateSO used by your camera controller
Default Cursor State SO The cursor state to restore when the pointer leaves the minimap
Over UI Cursor State Your OverUICursorState asset

Ensure Raycast Target is enabled on the Image component so pointer events are received.