SemGen is a software tool designed to help physiological modelers more easily build, annotate, and reuse models. The University of Washington's Semantics of Biological Processes group, in collaboration with VPR researchers at the University of Michigan, are developing SemGen to provide modelers with a more modular approach to model-building. The team hopes the software will significantly accelerate physiological model development among research groups studying multi-scale physiological processes. The SemGen development team recently released a new major version of the software. Among many major enhancements, the new version provides D3-based visualizations of a model's computational network which can help users quickly grasp a model's architecture and underlying assumptions. More information about the release is available on the SemGen GitHub development site.