Of course, you can't make renderings without 3D models. Depending on the project, you don't always need a rendering to be 100% true to the construction, such as internal areas and manufacturing details. Conversely, you may be more concerned with demonstrating those construction details than photorealism. Maybe you need both? I have the experience to not only illustrate how a project should look, but also how it will work, how it is made and how it functions.