Molecular simulation is nowadays becoming a routine technique in structural biology. Recent progress along with increasingly widespread access to substantial computing power now enables the study of macromolecular systems in interactive time. Visual inspection of MD trajectories is a good way to quickly discover general trends and perform initial analysis. Interactive Molecular Simulation (IMS) provides visualisation of and interaction with a simulation in progress, as well as possible on-the-fly control over simulation settings. Yet, few simulation and visualisation programs implement these features or often lack functionalities such as dynamic “live” analysis tools or efficient rendering.