Willi Krappen

Lemonverse

Co-founded a Münster-based agency for industrial VR hands-on training. Concept through to on-site hardware deployment — with a progress dashboard for training KPIs.

2021–2024

Key engineering call

Browser VR over a standalone app — web delivery via Three.js / R3F drastically lowers friction compared to an app install. Customers could roll out the same build to PC, headset and tablet; updates became a URL refresh.

High-end provider for virtual, augmented and mixed reality applications focused on employee training: machine operation, maintenance, safety procedures. Built an in-house process framework — from material collection with subject-matter experts through storyboard and capture, to a tutorial mode, hands-on scenarios and a final assessment phase. Learning progress lands in a dashboard with per-employee completion rates. As technical co-founder: stack choice, build pipeline, engine work (Three.js / R3F + 360° video), web delivery and on-site hardware setup at customer locations.

About the company

Lemonverse was a high-end Münster agency specialised in VR, AR and mixed-reality applications focused on industrial training. Consultation stayed free and remote; delivery ran from storyboard to the VR headset on the factory floor.

Product pillars

Three main product lines — all built on the same process framework, the same tracking dashboard, the same engine stack.

Virtual Reality Hands-On Trainings

Employees put on the headset, walk through tutorial + hands-on scenarios + an assessment. Machine operation, maintenance, safety.

Interactive 360°

360° content for onboarding, location tours or museum experiences — interactive, in the browser or as a VR variant.

Augmented / Mixed Reality

Spatial applications that fuse digital content with the real environment — training on the actual object with overlays.

Process — from idea to headset

Six phases, from workshop to hardware setup. Regular milestones; nothing moves forward without a sign-off.

  1. 1

    Discovery

    Collect materials and ideas with subject-matter experts, clarify learning objectives, build a storyboard, match a project plan to budget.

  2. 2

    Capture

    Capture 360° footage and 3D content on-site with the customer, using real machines or training environments.

  3. 3

    Engine & Web Build

    Build the VR scene in Three.js / React Three Fiber with a tutorial mode, hands-on exercises and an assessment phase. Web delivery via a build pipeline.

  4. 4

    Workshops & Iteration

    Regular workshops with the customer over Teams and Miro; feedback and corrections flow into scheduled milestones.

  5. 5

    Deployment & Hardware

    On-site setup of VR hardware at customer locations, training internal staff so a VR expert is always available in-house.

  6. 6

    Tracking

    Per-employee learning progress lands in a dashboard with completion rates and history — visible to HR or the training team.

My role

  • Co-founder of Lemonverse GmbH (Münster, 2021).
  • Technical lead across the company's lifespan — stack choice, build pipeline, engine work.
  • Engine work in Three.js / React Three Fiber for every customer delivery; in-house patterns for tutorial / assessment modes and for deterministic replay of training scenarios.
  • Built the learning-progress dashboard (React frontend + tracking backend) shipped with every delivery.
  • On-site hardware setup at customer locations, including training of internal trainers.
  • Direct contact with industry and research stakeholders: requirements workshops, storyboarding, milestone reviews.

What I took away

VR training is UX work, not 3D art

The hardest question is never 'what does the model look like' but 'how does it guide an untrained person through a hands-on exercise without losing them'. The answer is clear task slots, immediate feedback and a consistent UI vocabulary across trainings.

Discovery with subject-matter experts is 50% of the value

Capture and storyboard decide the quality — not the engine. Workshops over Teams and Miro with the customer's domain experts were the standard phase 1 of every delivery.

Browser VR over standalone where possible

Web-based delivery via Three.js / R3F dramatically lowers friction compared to an app install. Customers could roll out the same build to PC, headset and tablet — and updates became a URL refresh.

Customers need evidence, not wow moments

The dashboard with completion rates mattered more in sales than the demo itself — because HR / training departments use it to prove impact to their management.

Note on the company

Lemonverse was wound down in 2024. lemonverse.de is a reduced marketing site from the active period — it shows the product portfolio of the time and is linked here for reference only. Customer materials are under NDA and not public on the live site.