2021-03-23.VCell 7.4 has been released. New in VCell 7.4 is the ability to preview geometries from the VCell database, vastly accelerated multiple trajectory stochastic simulations using the Gibson-Bruck solver, extension of unit display and automatic conversion to rate and assignment rules, support for external access to containerized versions of some VCell solvers with command line execution, as well as numerous additional improvements and bug fixes.