Open source framework for creative coding

OPENRNDR is our largest and longest running project and is a crucial tool for most of our work. OPENRNDR is a tool to create tools, an open source framework for creative coding, written in Kotlin, that simplifies writing real-time interactive software. 

Development of OPENRNDR was started in 2010 at LUSTlab under the name RNDR, with the idea to create an in-house framework that was versatile enough to sketch in, but at the same time be robust enough to deliver production-quality interactive media installations, that you know will also run without worries in a few years from now. It takes the creative mind set of a designer or artist, and combines that with the power of IT-grade software. As we could not find this in existing software, we had to develop this ourselves. We are convinced that there are many more people out there that crave for the same. 

When LUST and LUSTlab closed doors in 2017, the newly formed studio RNDR continued development and changed the name to OPENRNDR, a precursor to our goal to distribute the software under an open source license. We translated the framework from Java 8 to Kotlin, made a project site, created a very extensive guide, and developed the API documentation. The framework was officially launched in June 2018, and we are improving and adding features almost bi-weekly. functions as a gateway to all the relevant information around the framework, where to find the downloads, tutorials, the guide, the API, the Github page and much more. You can also find example projects, and in-depth articles on use cases that are posted on the OPENRNDR Medium pages. 

Recently we have spent a considerable amount of time to improve the quality of the documentation found in the guide. The guide suffered from incomplete and incorrect examples, and the lack of visual media to demonstrate what the example does. We developed a set of tools that is able to convert the contents of the existing guide and improve the guide with verified-to-work examples. The added ease of automatically generated image and video captures of examples should make the guide a whole lot nicer to read and browse through.

OPENRNDR is distributed as open source under a BSD 2-clause license. The BSD 2-clause license allows you almost unlimited freedom with the software so long as you include the BSD copyright notice in it.

OPENRNDR won a Dutch Design Award 2019, from the jury report:

— “OPENRNDR is a generous, beautifully designed platform of a very high quality, developed with infectious enjoyment. A revolution for the profession; a living organism that facilitates and challenges the design community.”

Show reel of projects made in OPENRNDR
All project courtesy of their respective makers:
Compilation of some of the OPENRNDR workshops.

Follow OPENRNDR on Instagram or Twitter for updates, workshops, events etc.. 

Den Haag
Interactive real-time installation exposing the mechanics of creative coding for Electric Castle Festival, 2019
Read more
No_Code: Shelter
Visual language for an exhibition at Salone del Mobile, Milano
Read more
Good Governments, Happy People
Tool to inspect the indicators that might make a good government
Read more
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RNDR is a design studio for interactive media that develops ‘tools’ that are only finished by how they are used.

To achieve this, we develop processes, create structures, design visualisations, code programs, and create interactions. The end result can manifest itself across different media, ranging from interactive installations, data visualisations, generative identities, prints and everything in between – often real-time. We are triggered by how information and technology transforms networks, cultures, societies, relationships, behaviours, and interactions between people.

RNDR was founded in 2017 in The Hague, (NL). Its main members have years of experience as partners, computer scientists, designers, and developers at LUST and LUSTlab.

One of our core projects, and basis for most of our projects, is OPENRNDR, an open source framework for creative coding –written in Kotlin for the JVM– with over seven years of development, that simplifies writing real-time audio-visual interactive software. OPENRNDR is fundamental for the work and software capacity of RNDR as a studio, as it allows us to realize complex interactive works.

Jeroen Barendse (NL), partner. Design and art direction. Former partner of LUST and LUSTlab. Awarded BNO Piet Zwart Oeuvre Prize 2017
Edwin Jakobs (NL), partner. Computer scientist, creative coder and visual artist. Creator of OPENRNDR
Boyd Rotgans (NL), partner. Creative coder & interaction designer
Viola Bernacchi (IT). Design & data visualisation
Els van Dijk (NL), Office manager
Ferdinand Sorg (DE), Intern
Previously at RNDR
Jaekook Han (KR), Intern, Graduate Interactive Telecommunications Program, NYC, 2019
Gábor Kerekes (HU), Developer, 2017-2019
Amir Houieh (IR), Developer, 2017-2018
Łukasz Gula (PL), Intern, Royal Academy of Art, The Hague, 2018
Noemi Biro (RO), Intern, Willem de Kooning Academy, Rotterdam, 2018
Selection of exhibitions
Open Highway, Raum, Utrecht, 2018
Typojanchi Typography Biennale Seoul, main exhibitor (as LUST), 2017
Cartographies of Rest, interactive installation at Mile End Art Pavilion in London (as LUST), 2016
Hyperlocator, What’s next, Future Tomorrow, 38CC Delft (as LUST), 2016
Type/Dynamics exhibition, Stedelijk Museum Amsterdam (as LUST), 2014
Selection of lectures
MiXit conference, Lyon, 2019
Google Span conference, presentation and demo, Helsinki, 2018
JFuture conference, Minsk, 2018
Creative Coding Utrecht, Launch of OPENRNDR, 2018
Selection of workshops
Workshop OPENRNDR at Artez Interaction Design, Arnhem, 2019
Processing Community Day 2019, CCU and Sensorlab, Utrecht, 2019
Royal Academy of Art (KABK), Techweek, The Hague, 2019
Utrecht School for the Arts (HKU), OPENRNDR workshop, 2018
La Scuola Open Source, 1-week workshop, Bari, Italy, 2018
Two-week workshop at TUMO foundation, Yerevan, Armenia, 2019



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+31 (0)70.3635776

Open source framework for creative coding that simplifies writing real-time interactive software