More than 5,000 artists have already registered for the Adobe-Red Bull Collective Art project, and more than 60% of the time slots have already been reserved. As the site explains,

It is an evolution of the concept of “Cadavre Exquis” in which each collaborator adds to the Collective Art through being allowed to see the end of what the previous artist contributed. Participants are free to choose if they want to paint, draw or scribble their work or just to create it digitally with design software.

As the Adobe site says,

Sign up here to create an original piece of art to contribute as part of a global collective art installation. Then join Adobe® Creative Cloud™ to download Adobe creative tools you’ll need, such as Adobe Photoshop® and Illustrator®, to create your masterpiece.

Here’s footage of the event happening in Greece: