In architectural rendering, a gray-scale rendering may be used as an initial step in the rendering process to focus on the accuracy of the model without being distracted by color, lighting, or materials.

A gray-scale model or rendering involves the process of generating a Computer Generated (CG) image that represents objects without any colors or textures.

My initial approach when constructing a model from scratch is to create a gray-scale rendering without focusing on lighting and composition. This allows you to review and ensure the accuracy of the model. Starting with a gray-scale version makes it easier to make revisions before adding colors and materials, as changes become more challenging to implement once these elements are applied.