Case study · Momentum Worldwide · General Motors

A product specialist you could talk to.

When Chevrolet launched the Bolt EV and Bolt EUV in Canada, it wanted a conversation, not another campaign site. With Momentum Worldwide we built EVE, a digital-human ambassador who answered real questions about electric driving by voice or text, in real time. I worked on the UX across the experience and designed the mobile UI.

Role: UX & UI Designer
Agency · Client: Momentum Worldwide · General Motors (Chevrolet)
When: 2021–2022
Status: Launched with the Bolt EV and Bolt EUV in Canada

EVE, a digital human in a blue blazer, beside the blue Bolt EV and the silver Bolt EUV — EVE with the Bolt EV and Bolt EUV

The challenge

EVs were mainstream. EV knowledge wasn’t.

Range, charging, battery life, running costs: people had more questions than anyone was answering. Chevrolet wanted something no car brand had done, an intelligent, human-like ambassador who could explain the Bolt in real time, learn from every conversation, and feel personal rather than robotic.

A person, not a bot
Approachable, knowledgeable and recognisably Chevrolet.
Speak or type
Voice and text interchangeable, with every answer transcribed live.
Realism and brand
MetaHuman realism inside Chevrolet’s identity, which moved from red to electric blue mid-project.
Built to scale
A framework ready for more vehicles, markets and languages.

Watch

See EVE in action.

The solution

Making AI feel human.

EVE is built in Epic’s MetaHuman, streamed live to the browser and driven by machine learning. Her gestures, micro-expressions and eye movement are animated in real time, so she holds attention the way a person does.

Visitors talk or type, and every answer is transcribed as she speaks, so anyone can switch between the two mid-way.

EVE gesturing towards the Bolt EV in a garage, with the conversation transcript in blue bubbles on the right and a reply field below — Every answer transcribed as EVE speaks

Close-up of EVE in her blue blazer with the chat panel beside her: her greeting, a request for the visitor’s name, and the listening indicator — Listening: the moment a visitor starts to speak

Face to interface

Building a person, then a personality.

EVE went from a rough mesh to a finished face, then a wardrobe and a set of gestures. Her personality was written for a Canadian audience: smart, friendly and direct.

A low-poly grey mesh of EVE beside a blocked-out car, the first 3D pass — 1 · Blocking out

EVE’s finished face without hair, lit against a dark background — 2 · The face

3 · Hair and finish

Six variations of EVE’s face and hair, from early MetaHuman tests to the final look — Finding EVE: six looks tested before the final face

EVE from the waist up in five poses: standing, gesturing, presenting and holding a tablet — A library of gestures for presenting the cars

How it was made

Storyboards first, then a brand change.

The conversation was storyboarded and prototyped in Adobe XD before anything was built, so voice-triggered moments could be shown to Chevrolet early. I mapped the scenarios and the states around a spoken answer: listening, thinking, speaking, and what EVE does when she has no answer.

When Chevrolet’s electric-blue identity arrived partway through, the design system in Sketch and Figma let the whole experience be re-skinned without touching a flow.

01 · Storyboard

Hand-drawn storyboard sheets for EVE on a blue background, with a sketched tablet screen of her beside the Bolt — Storyboarding the conversation

A sketched EVE beside a sketched Bolt EV inside an early interface layout, with the EV / EUV toggle — Early interface, sketched

A pencil sketch of EVE opening the boot of the Bolt — Storyboard frame: showing the boot space

02 · Scenario flows

Low-fidelity flow diagrams with a sketched EVE: the first-visit journey across the top, with the returning-visitor, unsupported-browser and busy-session scenarios below — My scenario flows: first visit along the top; returning visitor, unsupported browser and busy session below

03 · States and system

Eight annotated screens showing the microphone states: muted by default, hover, the browser permission prompt, listening, and manual mute — The microphone states I mapped, from muted by default to listening

Design-system boards in Chevrolet’s original gold identity: colour palette, menus, buttons and layouts — The design system in Chevrolet gold

The same design-system boards re-skinned in Chevrolet’s new electric-blue identity — The same system re-skinned in electric blue

Every screen

Desktop, tablet, and one-handed.

EVE had to work wherever people found her. I designed the mobile UI: EVE and the transcript sharing a small screen, the listening state unmistakable, and the contact and enquiry forms kept to a thumb’s reach.