本大师课概述了HOUDINI 15中群体模拟的一些新功能。它包括了为代理创建附加层的工具，ragdoll模拟，材质样式表，还有工作流程的改进

This masterclass provides an overview of several new features and improvements for crowd simulations in Houdini 15. This includes: tools for creating additional layers for an agent, ragdoll simulations, material stylesheets, and many workflow improvements.