Architectural visualization was initially limited to hand-painted works of art. It is now better known for 3D artwork. Even though the words are the same, the 3D architectural rendering process has brought big changes in itself. Hand-painted architectural visuals are adapted and colored and illuminated on a flat surface.
In 3D architectural imagery, they are arranged as virtual reality scenes with the help of computers and the images are created using complex calculations. The process associated with this calculation is called "imaging." In ancient times, traditional architectural illustration was an essential service and was available for high-quality artwork. So far, it has been difficult to find a good illustrator. It is difficult to make changes. They have been found to be inaccurate, although the illustrator is not to blame for the end result.
These days it's very common to see how 3D based architectural illustrations and artworks are created. But tell me now that computer-generated images became popular in the early 1990s. At that time, it took longer to create architectural drawings for computer-generated drawings than for hand-drawn illustrations. Today there are also so many companies that provide the facility of Outsourced 3D Rendering & Visualization services.
Image Source: Google
3D is now suitable not only for traditional illustrations but also for real photography. Today's 3D visualization artists are considered specialists. The concept of creating 3D computer images, including animators, character animators, modelers, texture/material designers, lighting specialists, and IT staff, is also seen as necessary because they are responsible for maintaining the hardware.
Hardware is seen as the biggest problem we have to tackle to get realistic 3D visualizations in a timely manner and of acceptable quality. In the absence of good rendering, you should know that more computing power is required.