In order to build a model, a 3D artist needs to understand the project. Using plans, sketches, and reference images provided by the client, a 3D artist starts by visualizing the project in his or her head.
We start modeling the project following cad or pdf files. We can also work with hand sketches, revit files, etc.
The 3D artist applies colors and materials to the 3D model to make it look as realistic as possible. This step is analogous to painting a physical model, or gluing materials and photographs onto it.
We set up the lights into the 3D scene to replicate lighting in the real world. This stage is similar to the way a photographer or videographer would set up lighting equipment before shooting.
The 2D image or images are generated from the model. This phase is the actual rendering process. It is analogous to taking a photo of a physical model. Rendering can take anywhere from several seconds to several days, depending on the complexity of the model and the quality desired. This process is completed solely by the computer. In some cases this will be done on large rendering computers called render farms.
The preview images that are provided to the client for feedback are low quality renders using the same process as the final render will be, in order to speed up the revision process. Revisions are made to the scene, textures, and lights and the process is repeated until the desired results are achieved.
Final 3D renderings are provided to the client. Depending on the desired resolution the images will be provided in a specific format to support the way in which the image will be displayed.