ProBuilder is a Unity asset that Unity bought and incorporated into the 2018 version of Unity. ProBuilder simplifies creating 3D levels. Unity’s instructions on installing ProBuilder are a little vague so I’m writing this post on how to get started with ProBuilder using Unity 2018. Adding ProBuilder to Your Project Start by creating a new project using the 3D template. ProBuilder works only with 3D projects. After creating your project you must add ProBuilder to the project.