An important idea is that "form follows function". In other words, when people look at the design, they should see the purpose. This is like other modernist architecture. However, structural and functional parts, such as columns, beams, and even pipes, are also important in Brutalism. These functional parts should be easy to see and stand out. Another idea is that each material should naturally look like itself. Brick should look like brick, glass should look like glass, and so on. 