3D interior and exterior renderings give us a photorealistic video or image of an apartment building before it has gone under construction. 3D rendering is the process of using special software to bring a digital model to life with furniture and landscaping to give it a realistic effect. The idea is to show a finished project to your prospects to give them the confidence they need to sign a lease. 3D renderings are an absolute must when it comes to marketing for a property that hasn't been built yet.