Arvr 1 - Fusion MR Room Minimap

Level

BEGINNER

Overview

The MR Room Minimap sample demonstrates how Fusion can be used to mix colocalized users remote users in a mixed reality scenario, using the Anchors add-on.

Note: this sample focus on manual re-positioning of the various user rooms. To see a sample with an automatic mixed reality rooms alignment, designed to progressively build a common working table, see the Collaboration Desk sample.

Each user has locally a minimap, showing:

remote users and their room walls
the combined remote room provided by the Anchors add-on, to give a VR background to remote users and objects outside of the local real life room
virtual objects marked to be on the map (here, a magnetic board, and post-it dispensers)

Technical Info

This sample uses the Shared Authority topology,
The project has been developed with Unity 6.3, Fusion 2 and tested with the following packages :
- Meta XR Core SDK 85.0.0 : com.meta.xr.sdk.core
- Meta MRUK 85.0.0 : com.meta.xr.mrutilitykit
- OpenXR plugin 1.16.1 : com.unity.xr.openxr
Headset firmware version: v85

Before you start

To run the sample :

Create a Fusion AppId in the PhotonEngine Dashboard and paste it into the App Id Fusion field in Real Time Settings (reachable from the Fusion menu).
Create a Voice AppId in the PhotonEngine Dashboard and paste it into the App Id Voice field in Real Time Settings

Download

Version	Release Date	Download
2.0.12	4월 14, 2026	Fusion MR Room Minimap 2.0.12

Folder Structure

The main folder /MRRoomMinimap contains all elements specific to this sample.

The /Photon folder contains the Fusion and Photon Voice SDK.

The /Photon/FusionAddons folder contains the Industries Addons used in this sample.

The /Photon/FusionAddons/FusionXRShared folder contains the rig and grabbing logic coming from the VR shared sample, creating a FusionXRShared light SDK that can be shared with other projects.

The /XR folder contains configuration files for virtual reality.

Architecture overview

The MR Room Minimap sample is based on the XR Shared add-on, notably for the rig synchronization.

Aside from this base, the sample, like the other XR samples, contains some extensions to the XR add-ons, to handle some reusable features like marker detection, mixed reality rooms repositioning, large data synchronization or touching.

Sticky notes and drawing pens

The simple illustrating drawing use case is provided by:

the TextureDrawing,
the LineDrawing,
and the StickyNotes add-ons.

Mixed reality rooms handling

The Anchors addon provides:

the colocation logic, to ensure users in the same room can share the same spatial reference, after scanning a common visual marker,
the combined remote room, providing a VR background context for remote users or objects when they are outside of the local room limits,
the room repositioning logic,
the minimap itself

SceneFocusedElement components have been placed on the post-it dispensers and magnetic board, to ensure they appear on the minimap, and have a virtual background behind them if outside of the local user real life room.

To appear on the minimap, the player network rig contains:

a NetworkIRLRoomMember component (it also enable colocation scenario)
a NetworkIRLRoomAssociatedPart component, with a User part type

Hardware rig construction

The hardware rig has been generated by the Meta's core building blocks, and is synchronized to the network rig with the MetaCoreIntegration Addon's components.

Network Connection

The network connection is managed by the Meta building blocks [BuildingBlock] Network Manager && [BuildingBlock] Auto Matchmaking.

[BuildingBlock] Auto Matchmaking set the room name and Fusion topology (Shared mode).

[BuildingBlock] Network Manager contains the Fusion's NetworkRunner. The UserSpawnercomponent, placed on it, spawns the user prefab when the user joins the room and handles the Photon Voice connection.

Used XR Addons & Industries Addons

To make it easy for everyone to get started with their 3D/XR project prototyping, we provide a comprehensive list of reusable addons.
See Industries Addons for more details.

Here are the addons we've used in this sample.

XRShared

XRShared addon provides the base components to create a XR experience compatible with Fusion.
It is in charge of the players' rig parts synchronization, and provides simple features such as grabbing and teleport.

See XRShared for more details.

Voice Helpers

The VoiceHelpers addon is used for the voice integration.

See VoiceHelpers Addon for more details.

Anchors

The Anchors addon is used for colocation, room repositioning, the combined remote room, and the room minimap.

See Anchors Addon for more details.

Dynamic Audio group

The dynamic audio group addon is used to enable users to chat together, while taking into account the distance between users to optimize comfort and bandwidth consumption. The ColocDynamicAudioGroupMember component ensures to also cut the voice transmission for colocalized users (as they are in the same real life room, no need to sync their voice when they are close).

See Dynamic Audio Group XR Addon for more details.