3D modeling applied in interior and exterior, industrial, architectural and engineering design, consists of the mathematical representation of a real project (that is going to be executed or that has already been executed), in a virtual environment that allows establishing physical properties. and mechanics of the materials to be used, for further evaluation.
One of the main advantages of having a 3D model is that you can generate concepts for any idea without the need to install a single screw. There is no imminent risk of having a piece of glass manufactured, cutting material for a section of railing or door without first knowing what the final result will be.
Added to the above, we have the construction plans. They are a scale representation of a modeled project, close to fabrication and installation. As you already know, it is not advisable to start the construction of a project if the dimensions of the available space are not taken into account, among other things.
If you are working on a project that requires elements made of materials such as glass, in any of its presentations, thanks to the construction plans you avoid having to discard a unit or an entire set due to a measurement error. These types of errors are even worse than overdoing the amount of material, because in this case, the glass is not reused.
Finally, in the design phase we have 3D rendering, which consists of the generation of photo-realistic images, which can be used, among other things, to achieve a higher level of detail in the presentation of projects. It makes it possible to faithfully transmit the textures and other visual characteristics of the materials and place the product in an environment similar to the environment where it will be installed in reality.
You will have a presentation of your first level product. If you are in a major work, with a quality render you will be able to convey the potential of your ideas, before they are implemented.