Building Envelope: Customizing Curtain Patterns & Panels on Thursday, 06 October 2011. Posted in Recent, 2011 - CEE 110/210, Session 4: Modeling Floors and Roofs 2011 - Session 4 - Part 2 Building Envelope: Customizing Curtain Patterns & Panels Tags: curtain walls, doors, grids, mullions, panels, Revit