Which technique is NOT commonly used to produce technical drawings?

Digital photography is not commonly used to produce technical drawings because it captures images rather than creating scaled, detailed representations of designs. Technical drawings require precise dimensions, annotations, and a consistent scale, which are not characteristics of photographs.

In contrast, 3D engineering drawings are used for visualizing objects in three dimensions, allowing for comprehensive views that support better understanding and design analysis. 2D engineering drawings provide a flat representation of components and assemblies, offering accurate measurements and details for production. Technical illustrations, which can include renderings and diagrams, are specifically designed to convey complex information in a clear and organized manner. All of these techniques serve the purpose of detailed design representation, whereas digital photography serves more as a documentation or presentation tool rather than a drawing technique.