Interior Rendering Engine The portal based interior engine is capable of rendering enormous enclosed spaces. External light sources filter through windows and properly illuminate interior surfaces. Feature Highlights: • Portal based visibility • Level-of-Detail support • Detail brushes • Per pixel, colored light maps • Animated lightmaps • Buildings can be instanced, placed, manipulated and scaled • Seamless integration with the terrain engine Editors: • Constructor .map editor • Quark .map editor • 3D World Studio editor • Hammer .map editor