What is virtual reality?

Put on an enclosed headset and the room you are standing in disappears. What replaces it is a computer-made space in three dimensions that answers your head and body as you move, so looking around it works the way looking around a real room does.

A fitting scenario for practising headset setup.

The room is replaced, on purpose

Everything a wearer sees and hears comes from the headset. That total replacement is what makes VR well suited to rehearsing high-pressure or high-risk situations safely and repeatedly.

It is the wrong tool when people need to keep watching their real surroundings.

How virtual reality works in practice

The illusion holds because several pieces of hardware agree with each other, many times a second, about where the wearer's head is.

Two people inspect the headset lenses. A VR training scenario for what is virtual reality. — **The headset.** An enclosed head-mounted display with high-resolution screens and lenses that focus them for human eyes, giving a wide field of view, typically between 90 and 110 degrees.

A learner moves inside a tracked space. A VR training scenario for what is extended reality. — **Positional and rotational tracking.** Three degrees of freedom tracks head rotation from a fixed point; six degrees of freedom also tracks walking, stepping, ducking and leaning through the space.

Three people inspect a practice boundary. A VR training scenario for what is virtual reality. — **Inside-out tracking.** Modern standalone headsets use outward-facing cameras and computer vision to track their position in the room, with no external base stations.

A participant tests hand movement while a coach observes. A VR training scenario for immersive XR. — **Controllers and hand tracking.** Wireless controllers with buttons and sensors, or bare-hand tracking from the headset cameras, for handling virtual objects.

Two people test a controller beside a switch. A VR training scenario for what is virtual reality. — **Haptic feedback.** Precision vibration motors in the controllers give a tactile response when a virtual control is touched or activated.

A facilitator stands among sound forms. A VR training scenario for what is extended reality. — **Spatial audio.** Speakers or headphones place each sound at the distance and direction it comes from in the simulation.

Two kinds of headset

Standalone devices carry their own processor and battery and run without cables; PC-tethered headsets connect to a high-performance computer for graphically intensive engineering or scientific visualisation.

A learner tries hand tracking with a standalone headset on a rooftop. — Hand tracking on a standalone headset, outdoors.

Standalone or tethered

A standalone headset is the one most training programs run on: it goes where the learner is, and a facilitator can carry a case of them.

A tethered headset stays at a desk beside the computer that drives it. It earns its place when the model on screen is too heavy for a headset to handle alone.

What it feels like to use VR

The word for what happens next is presence: the point where a person stops watching a place and starts being in it.

Two open hands rise into the lower frame, palms toward camera, lit from below by cool blue light, a first-person moment from PTR's immersive training showreel. — Your own hands, which is where presence starts.

Objects at their real size, at a believable depth

Because the display answers every small head movement, objects read at 1:1 physical scale.

Refresh rates of 90 to 120 frames per second and low latency, the delay between moving and the screen updating, keep the movement comfortable.

Headsets also adjust for interpupillary distance, the gap between the centres of the pupils, to keep the image clear and reduce eye fatigue.

Where virtual reality is commonly used

VR earns its place when the real version of the activity is hard, costly or dangerous to arrange.

A crew member in a high-visibility shirt and hard hat, wearing a headset, turns quickly on a plant-area concrete pad and raises an arm to signal, practising an emergency response. — **High-risk and safety training.** Emergency evacuations, firefighting, working at heights, electrical isolation and hazard identification, with mistakes made safely and without damage.

Inside the simulation, a resuscitation bay is seen from the foot of an empty bed, equipment trolleys nearby, three clinicians waiting on the wearer's call. — **Healthcare and clinical education.** Surgical rehearsal, anatomy, equipment training and communication practice, repeated until the procedure is familiar.

A simulated TAFE trade workshop, roller door open onto afternoon sun, steel benches and dust drifting. A young apprentice in a headset lifts a welding torch while an instructor watches. — **Higher education and vocational learning.** Virtual laboratories, engineering machinery and historical reconstructions for hands-on exercises that would otherwise cost too much.

Two people inspect a vehicle structure. A VR training scenario for XR and AI concepts explained simply. — **Design review and spatial walkthroughs.** Architects, planners and industrial designers walk a full-scale plan or assembly before anything is built.

The same uses from inside the headset

Reaching for a component, hesitating at a door, and a first-time user lifting both hands: what any of the uses above looks like from the wearer's own eyes.

Two hands reach toward a soft translucent pale-blue component floating in the air, a first-person moment from PTR's immersive training showreel. — Reaching for something that is not there.

Two hands hover at an open front door, about to knock, a hallway with a coat rack visible beyond, a first-person moment from a doorstep training scenario. — The hesitation before the knock.

A woman in her eighties wearing the headset lifts both hands in front of her, mouth open, during her first VR training experience. — A first-time VR user lifts both hands.

Virtual reality in practice at PTR

PTR's own VR work concentrates on communication and behaviour change: the conversations people find hardest, rehearsed in the rooms they happen in.

A ward scenario for practising feedback conversations. — A facilitator guides a nurse in the corridor.

Mater Education, Speaking with Good Judgement

Mater Education, part of the Mater hospital group in Queensland, worked with PTR to bring its staff communication program into a branched VR recreation of real Mater environments. It was delivered face to face to more than 60 staff.

Mater's own program evaluation reported that 93% of participants enjoyed the experience and 96% wanted more VR-based learning in future programs. Full case study

Download the Mater case study PDF

A cafe scenario for practising supported movement. — A beachside session with a facilitator alongside.

Central Coast, Mayo Clinic and Google

Central Coast Council took a similar approach for a different goal: a first-person VR experience giving people the perspective of someone with a disability in a beach and a shopping centre, used more than 200 times across community, teacher-training and CSIRO-facilitated sessions.

PTR's own VR programs report measured outcomes: Mayo Clinic's "A Day In a Lifetime", built by People Tech Revolution and evaluated across two peer-reviewed papers, and the Google CHI 2024 VR DEI training, led by PTR co-founder Leonie Sanderson, built with Equal Reality, a subsidiary of People Tech Revolution, and published as an academic case study.

What virtual reality is not

What VR gets mistaken for, and the difference in each case.

A facilitator stands at the centre of a fixed scene. A VR training scenario for what is virtual reality. — **VR is not simply 360 video.** 360 video lets a user look around from one fixed camera point, but it is pre-recorded and non-interactive. True VR creates an interactive 3D environment in real time, so a user can walk through it and handle objects. 360 still has a deliberate place: it runs in an ordinary browser on any device, so it is often the easiest first taste of immersion. PTR's own live 360 experience on PTR Labs works exactly that way: drag, or move your phone, and look around a real place with no headset.

Two people examine a form and its shadow. A VR training scenario for what is augmented reality. — **VR is not augmented reality.** VR replaces the real world with a virtual one. AR keeps the physical room visible and places digital information on top of real objects.

A learner demonstrates limited head movement. A VR training scenario for immersive VR training questions answered. — **VR does not inevitably cause nausea.** Early devices caused discomfort through display lag and low frame rates. High refresh rates, low-latency tracking and well-designed movement have reduced it for most users, and peer-reviewed research on cybersickness going back to 2000 sets out both the causes and the ways to reduce it.

Three people compare choices in VR. A VR training scenario for virtual reality training and simulation. — **VR training is not equally effective for every skill.** A 2025 peer-reviewed meta-analysis of VR in teacher education found a moderate overall effect that varied a great deal by what was taught: strongest for content knowledge and social skills, smaller for purely procedural or reflective tasks, and stronger on head-mounted displays than on desktop VR. VR suits some training goals more than others; it is not a uniform upgrade.

Is virtual reality the right fit?

A headset is a cost and a constraint as well as a capability. These are the conditions that settle it.

A person wearing a VR headset inside one of PTR's role-play, perspective or procedural training scenarios, under pressure cues. — A strong fit when The physical environment is hazardous or costly. Complete visual and spatial focus is needed. True physical scale matters: a building, a vehicle or an anatomical structure at 1:1. A difficult conversation or behaviour needs safe, repeatable rehearsal, as in the Mater and Mayo Clinic examples above.

A person at the edge of a marked floor boundary inside a headset, deciding whether to step further. — Not the right fit when There is no clear, safe physical area, since the wearer cannot see the real room. Headsets are shared and a minority of users still feel discomfort. The task needs real tools, real colleagues or the real environment in view, where AR or MR serve better. The content is used rarely or changes often, where a simpler format is more practical.

The short version

What replacing the room buys you, and what it costs.

A learner selects a VR role-play object. A VR training scenario for virtual reality training and simulation. — A learner weighs a choice between blocks.

Total replacement, for better and worse

VR replaces what you see and hear with a fully simulated environment, viewed through an enclosed headset. That total replacement is what makes it well suited to rehearsing high-pressure or high-risk situations safely and repeatedly.

It is unsuitable for tasks where people need to stay aware of their real surroundings.

See how virtual reality environments are designed and applied on the XR overview →

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