3D Exterior Renderings are used to produce photorealistic images that simulate architectural projects in their true environmental context. Discover the major benefits of creating superb archviz content for your projects. A 3D architectural rendering is a three-dimensional computer-generated image which shows what an architectural project will look like when it’s built. 3D renders are an essential visual tool for architects and other professionals to show clients what the end result will look like before construction begins.