Interactive rendering techniques were developed for focus+context visualization of 3D indoor models: (1) Semantic cutaways, levels of detail, ghosting, highlighting, and exploded views focus on selected regions while preserving global context. (2) The techniques were implemented using IFC building information models and tested on models ranging from under 100 to over 1,500 elements. (3) Potential applications include facility management and disaster response visualization, and performance depends mainly on model complexity and size.