Nvil, also known as VoidWorld, is a 3D polygon subdivision modelling application. It is built mainly base on feedbacks and requests from experienced artists in different fields. It is a collection of existing and new usefull ideas. The goal is to provide a more efficient tool with rich and stable functionalities. To achieve this, a sticky key based, contextual streamline system is built and it makes it possible for user to organize tools with less hotkeys but greater flexibility. The streamline system also makes it possible for user to change tools from one to another very quickly, thus a smooth fluidy workflow can be achieved. Nvil also provides multiple ways to execute a command or open a tool without the need of hotkeys through visual tool panels, top menus, radial menus, SmartTips and tool search window. User even can create own tool bars. Nvil is suitable for both organic and hard surface modelling.