We are developing a holistic approach for collaborative tools that allow real-time on-set light, asset and animation editing via an intuitive interface. VPET is a tablet based onset editing application to work within a virtual production environment. It is designed to run on mobile and head mounted devices allowing easy access to operators without dedicated training. It provides functionality to edit assets during a virtual shooting and synchronize changes with the film pipeline. VPET communicates through a network interface to main applications and other clients, allowing live editing of object, light and animation parameters. The development is open-source and particularly considers established (offline) film pipelines.