Contact: julienranzijn [at] gmail [dot] com Julien RanzijnJulien Ranzijn
Interaction designer, Interface designer, Programmer and some kind of guitar player.

In-game screenshot of ReLoop CAREN
Testing together with rehabilitant CAREN
In-game screenshot of ReLoop CAREN
ReLoop concept art CAREN
Testing the CAREN myself CAREN

ReLoop: (Military) Rehabilitation application

The CAREN is an advanced hardware and software system for registration, evaluation and training of functional human behaviour by Motek. One of these impressive machines is located at the Military Rehabilitation Center Doorn. We have been asked to design an application for CAREN that is capable of changing a patient's walking pattern or helping redevelop his/her ability to walk by making it a fully immersive experience.

We've made an application that stimulates the patient to make steps in specific ways, without them consciously focussing on stepping. With every step a part of a virtual, abstract environment is revealed, motivating patients to keep on walking.

ReLoop is rehabilitation patients can look forward to.


Coordination Remco Meinsma
Concept Julien Ranzijn, Rob van Duinen, Justin Grupper & Glenn Verheij
Code Julien Ranzijn
Graphic Design Rob van Duinen
Level Design Glenn Verheij
3D Modeling Justin Grupper

Rendez-vous concept art Rendez-vous
Rendez-vous in action at the 55th Biennale in Venice Rendez-vous
Rendez-vous in action during 'Games and Biz' in Antwerp Rendez-vous
Happy player Rendez-vous
Rendez-vous in action at the 55th Biennale in Venice Rendez-vous
Storyboard / User-scenario Rendez-vous

Meet through motions

Rendez-vous is a concept application for the Dropstuff "Kinect Art Challenge 2013".

Rendez-vous was exhibited at 55th Biennale in Venice & during 14th - 17th oktober at 'Games and Biz' symposium in Antwerp.

New technologies allow people to be closer together then ever before. The relative distance is getting smaller and smaller. The Kinect Art Challenge proves this once again by setting up two huge screens. One in Venice and one in Amsterdam. Which people from both cities can get a spontaneous and interactive experiences to meet each other.

We want to show the encounters between people in the purest form. These encounters lead to unexpected and spectacular outcomes. Users shall see themselves as sand men. When they encounter there sand will burst and leave an imprint on the screen. Creating at the end one big piece of art through there motions.


Coordination Julien Ranzijn
Concept Julien Ranzijn, Jason Schot, Suzanne Bon & Ruben Bernhardt
Code Julien Ranzijn & Fabian Heeres
Graphic design Julien Ranzijn
Music & Sound Joost van 't Hoff
Choreography Denise Gahler
Thanks to Dropstuff

Brainstorming and prototyping using a table as balanceboard Balancity
Installation sketch Balancity
Prototyping with beamers, screen and a bigger table as balanceboard Balancity
Building the screen Balancity
With a Wii Nunchuck connected to a Arduino we could get the angle of the balanceboard Balancity
Visitor balancing at Klaverkade 2012 Balancity


Feel the flow, experience the 'rush'. Experience the City

Balancity is an interactive installation that lets you experience the hectic and flow of a big city. Through standing on a balance-board the user tries to get in the flow (or not).

With a Wii controller connected to an Arduino we could control the movie and music using OpenFrameworks.

On 23th of June 2012 Balancity was exhibited at Klaverkade in Utrecht (NL).

Build together with Rob van Duinen,
Bo Zonneveld and Joey Tan.

CoLight prototype CoLight
Testing concept the concept with the target group home CoLight
CoLight light test using LED strips CoLight
CoLight in action CoLight


CoLight is concept to help elderly, using light, to focus on the stairs while going down.

Research shows that a majority of the falls among the elderly happens when they get down from the stairs. One of the reasons why this happens it bad eyesight. When you get older your sight becomes more blurry and colours lose their contrast. We came up with a concept that uses light to give the stairs more contrast and a better visual response. When you walk down. The next stair will highlight. Giving the needed contrast and feedback to get better of the stairs.

A concept by Raymond Reints, Julien Ranzijn, Sjoerd Mulder and Renée Nillesen