Experimental techniques continue to provide neuroscientists with structural and functional data on neurons at a rapidly increasing level of detail; biophysically-detailed brain models and simulations can provide integrated understanding of neuronal structures, connectivity, and function. Visual Neuronal Dynamics (VND) is award-winning software for 3D visualization and exploration of neuronal models and simulations. The software is produced by the Center, in collaboration with Allen Institute, and is compatible with the Brain Modeling Toolkit (BMTK). In addition to readily visualizing models at multiple scales, neuron firings can be animated showing how "lightning storms" travel through the brain. Advanced visualization techniques help the viewer make sense of the dense neuronal thicket. The latest VND release includes flexible browsing and selection of neuron attributes, GUI improvements with information about neurons, and a refined line-only viewing mode.