Unreal Engine 5 Documentation has been moved to the Epic Developer Community

Rendering to Multiple Displays with nDisplay

nDisplay renders your Unreal Engine scene on multiple synchronized display devices.

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Interactive content isn't limited to being displayed on a single screen, or even a single dual-screen device like a VR headset. An increasing number of visualization systems aim to immerse the viewer more effectively in the game environment by rendering real-time content through multiple simultaneous displays. These systems may be made up of multiple adjacent physical screens, such as a Powerwall display; or they may use multiple projectors to project the 3D environment onto physical surfaces like domes, tilted walls, or curved screens, such as in a Cave virtual environment.

The Unreal Engine supports these usage scenarios through a system called nDisplay . This system addresses some of the most important challenges in rendering 3D content simultaneously to multiple displays:

  • It eases the process of deploying and launching multiple instances of your Project across different computers in the network, each rendering to one or more display devices.

  • It manages all the calculations involved in computing the viewing frustum for each screen at every frame, based on the spatial layout of your display hardware.

  • It ensures that the content being shown on the various screens remains exactly in sync, with deterministic content across all instances of the Engine.

  • It offers passive and active stereoscopic rendering.

  • It can be driven by input from VR tracking systems, so that the viewpoint in the displays accurately follows the point of view of a moving viewer in real life.

  • It is flexible enough to support any number of screens in any relative orientation, and can be easily reused across any number of Projects.

For additional background information about nDisplay, a more in-depth look at the real-life applications and display systems it was designed to support, and the future vision for the technology, download the white paper here .

nDisplay was an integral part of the visuals for Childish Gambino's award-winning 2018 Pharos show . See the project spotlight video below!

Getting Started

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nDisplay Overview

Describes how multiple computers work together in an nDisplay rendering network.

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nDisplay Quick Start

A guide to your first steps getting up and running with nDisplay.

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nDisplay Configuration File Reference

A reference companion for all the settings available in the nDisplay configuration file.

Guides

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nDisplay Actor Replication

An overview of how to control Actor replication across your nDisplay cluster.

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Using VRPN Inputs

Describes how to set up nDisplay to get input from VRPN devices.

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Using Cluster Events

Describes how to send events to your nDisplay cluster, and how to respond to those events in Blueprints.

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Stereoscopic Rendering in nDisplay

Options for making nDisplay render stereoscopic images.

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Using Calibration Test Patterns

How to make nDisplay show test patterns that you can use to validate your setup.

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Adding nDisplay to an Existing Project

Describes how to set up any existing Project to be ready for nDisplay.

Reference

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Changing nDisplay Communication Ports

Describes the different communication ports nDisplay uses on each computer to communicate with other computers in the cluster.

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nDisplayLauncher UI Reference

A reference companion for all the settings in the nDisplayLauncher interface.

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