REGISTRATION In order to dive deeper into the state-of-the-art tools that allow creators to build astonishing virtual worlds, the 6th edition of L.E.V. Matadero festival will host the hackaton Avatar VR Sculpting run by Rick Treweek, also known as MetaRick. Supported by the European project Realities in Transition and Medialab Matadero, the creator of the awarded immersive universe Uncanny Alley will guide various sessions in a hybrid format from his office and home, the Metaverse, in which he will explain different VR Sculpting techniques for building an original avatar and getting it ready to use in VRChat. MetaRick, who has extensive experience in world building and has been recognized internationally, is the developer of a very recognizable series of avatars for his own virtual worlds for years. The hackathon will take place from Thursday 19h to Sunday 22th at L.E.V. Matadero festival, and is oriented to creators with some introductory...