"Sketching vs. Rendering”
The first thing I would like to clarify is the difference between the two. "Sketching" refers to drawings created manually, while "Rendering" refers to the use of computer software to create a representation of a design. In the case of rendering, a 3D model of the product is developed.
Today, there are various computer programs capable of producing digital renderings that closely resemble a real product.
Although CAD software can be used to create highly accurate renderings that are very similar to a physical product, sketching offers the advantage of allowing a greater number of design proposals to be generated in less time. This provides more versatility during the early stages of development, when the final product concept has not yet been fully defined.
Sketching makes it possible to visualize ideas more quickly than working with CAD software, allowing concepts to be captured and explored faster on paper.
On the other hand, rendering is most useful once the product proposal has been reasonably defined, as it helps avoid spending excessive time modeling multiple preliminary concepts.
For this reason, sketching is extremely useful during the initial stages of product development, as it allows multiple alternatives to be explored in a shorter amount of time. Rendering, meanwhile, is particularly valuable when developing the final proposal, as it can create an image that closely resembles the real product intended for manufacture, making it possible to visualize the final design through a realistic 3D representation.